I sold my P bass with threaded saddles, and I miss the bridge! I like bent bridges, as they are so simple that there isn't much room for nonsense to creep into the mix. Having said that, my Jazz bass currently has a Fender-branded Badass II fitted and I'm getting on ok with that.
A big disappointment for me was buying a used bass that had been upgraded to a Gotoh 201 bridge, and the back of the bridge was lifting. The metal had weakened along a line intersecting the mounting screw holes, and visibly lifting at the back under string tension. Having removed the bridge I was a bit disappointed to see that the block of the bridge wasn't actually solid metal at all. Like so:
A hollow bridge! Not exactly 'high mass', and a bit cheeky at £60. The good side of the Gotoh was that the saddles are held in place by grooves. I've not personally had too much issue with saddles shifting around on a bent plate bridge, but the scope is there for it to happen I suppose.
And at least with a bent plate bridge you can adjust it with a $5 multitool. I've come across a few fancier bridges that basically come with a ream of setscrews you need to slacken off, make softly-softly adjustments by hand, then tighten the whole charade back up. Lots of fiddly bespoke components and parts waiting to disappear up the hoover.
While the Badass II on my Jazz looks cool, I could not tell you what it adds or subtracts from the tone of the instrument. I've never seen any sort of cogent case for why or how a high mass bridge would improve the tone of an instrument. I like the look, and I like that the saddles are held firmly in place.