I'm reading this topic only now
Guitar strings are thin and wussy. Bass strings are thick and manly. You can't play pick bass like a guitar.
I'm a guitar player that switched to the bass after seven years of playing, and I can tell you that the technique is actually the same, but one should just consider that the strings react in a different way.
the "anchoring pinky, palm muting, all downstrokes" it's not a guitarist thing, is just a wrong method of playing with a pick, wether you are a guitar or bass player.
1. Never use a light or medium pick. Use at least a heavy. With a heavy, the pick does the work and takes the beating. With lighter picks, you do the work.
this is both right and wrong: the "absolute" is not a thing in life, and Jedi don't speak in absolutes
it depends on how the player learns to play: if your hand strangles the pick, using a medium or light pick is impossible, because it would bend against the strings and don't follow the movement of the hand.
if you learn to keep it light, without any strenght from the fingers, a light pick is harmless in any position.
on the other side, an heavy pick is easier to be kept "hard" in between the fingers, because it won't bend. so it seems easier to grab it and play hard.
personally I use a Dunlop Jazz III with the guitar, both for solo and strumming/rhythm, but on the bass I can only play with a .60mm pick, because heavier picks kills my wrist and fingers, and I can't play with the right dynamics and "freedom".
3. Pick close to the neck where the strings are looser.
this depends on the sound needed, just like playing with fingers. you can't get the "jaco sound" without playing on the bridge pickup.
however, with a heavy pick playing near the bridge is difficult , but on the other hand, playing with a medium pick near the bridge is harmless and easier.
the real problem is that usually
not-well-used-to-the-pick-players can't play lighlty! McCartney uses medium picks, has played near the neck with a light touch and even an harder touch without any issue at all. it's all just in playing without tensions on the arm and shoulder.
Palm muting is especially injurous, even though a lot of people do it.
same here: palm muting can cause injuries if used wrong: wrong means that you stick the palm on all the strings together and bend the wrist to change strings. this is just a wrong technique, or better, this is NOT technique, is just the lack of it.
the real palm muting makes you mute just the string you are playing and the lower strings (higher strings are stopped by the fretting hand).
this error is common, but it doesn't mean that palm muting is wrong, it's just wrongly used.
many people even push the hand against the strings while muting... I can feel the pain only thinking about it...
the Nikki Sixx method of anchoring the hand (even with an actual anchor

) is wrong, like it's wrong to anchor the thumb to the pickup on fingerstyle, and bending all the wrist to get to the higher strings.
however, palm-muting when playing near the neck is almost impossible, so the mute at the bridge is useful if not necessary.
NEVER MOVE YOUR THUMB!!! Moving your thumb is a killer.
go tell it to the virtuoso pick players out there

a smooth and NOT TENSE thumb movement, going with the wrist and elbow movement is the right combo to avoid injuries of any kind, because the pick follows the movement of the hand, and becomes part of the fingers, not a "foreing body" just kept between the fingers.
what everyone should learn while learning how to use a pick is to let it become part of the hand, so any movement is 100% natural and not forced, under tension or anything.
the fact that many players get it wrong is because they don't use it like that.
a pick player should learn to play with the pick in any position, without tension and without anchoring anywhere, having a complete control of the pick, like if it was an actual part of the hand.
the moment when it's a foreing body kept between the fingers, the technique is wrong in some way, causing the lack of freedom in playing.
and it's not related in any way to the gauge of the pick. many bassists that play only with a pick use medium picks, and are still rocking without any problem, because the can keep the pick in their hands.
making an example on myself, I find more difficult playing with a 1mm pick on bass, I can't do alternate strokes properly and it slips from my hand easilly, because it don't follow the hand movements, so holding it ligltly makes it slip over the strings, and I sould hold it tightly, using strenght and adding tension to the arm.
with .60mm picks or at least .73/75mm picks I can play for hours, because it's 100% a natural movement of the hand. I can use a dynamic range from super-soft to heavy/loud, I can pick on every inch of the string, I can palm-mute and use fast picking or slow picking, and I don't need to think about it, I just play naturally like when I play with only my fingers or the thumb.
those advices are good as a starting point, but are also a bit vague today. Carol is an old player, and she has the typical technique and attitude of 50's/60's bass players, and also plays harder than any player I've ever seen
to play like Gallup, Rourke, Burnel, Freeman and recent bass players it's not necessary to use a lot of strenght and heavy dynamic, slamming the strings like she does when she plays hard
you'll probably never see a modern pick player using lot of strenght, but just usind the pick like if it was part of the fingers.