I'll have to disagree with this. A lot of jazz players were, and are, schooled in Simandl technique which has been around for over 100 years. Even the electric bass has been around since the 50's, which is 60 years. Electric bass may not have the heritage of the violin, but it has certainly been around long enough to have a tradition.
As far as function goes, technique depends on what function you are trying to achieve. I'm sure when Larry Graham first slapped the bass, people told him to stop, that it was bad technique and didn't sound right; likely the first people that tapped got a cold response, the first time someone used feedback, etc. Jaco played too many notes, bass isn't a solo instrument, the purpose of the bass is to change the note on the drummers bass drum.
Further, as much as I hate political correctness, as long as we label technique as good and bad, we alienate a whole group of players. There may be reasons why someone would use "bad" technique to get a certain sound. Good and bad imply absolutes and there are no absolutes in playing. We should encourage innovation and thinking outside the box and help new players to learn traditional methods and then take them to new heights.
Great post, but i feel you are may be countering your point. Good and bad is about alienating the aspects of the playing and pinpointing the functionality, not have an excuse or get out by saying it is traditional or different, and if that alienates certain players let it be so.
You cite Larry Graham, so we look at the function of his technique, how does he get the sound he is hearing.
Second point to consider is the equipment and tecnology there to maximise it? Could the basses of the day and the amps and cab give the tonal responses he wanted?
In hitting the string with his thumb he has a the function he requires, but is the function good or bad? Does he hit to hard ?
Does he put his wrist under un-necessary pressure? Is his thumb joint in any position of stress or potential injury? Can he recreate the same sounds playing softer, etc etc?
Jaco played the correct amount of notes for what he wanted to convey in his playing, nothing about good or bad technique in that point it is a personal opinion of the listener not the player.
What you post implys that Double Bass technique is desirable for Electric Bass,,,which it is not, the two instrument have a totally different technique, they have to because they work in different planes. By that mean DB is vertical to the body and BG horizontal based, but don't take that literal it just means in relation to what the body can do in relation to them.
First and obvious difference is that DB sits on the ground and BG sits on the body or hangs from the body. So playing a DB you can bend over it gain access to the upper regions of the fingerboard, on a BG you extend your arm to gain access to the lower regions of the board. You can move the BG in relation to the body, you move the body in relation to the DB.
The Simandl part that is functional is using the ring and little finger as one in support...but why is this desirable? Well its function is to support the little finger, so it has sound function for those that use it, and its function works on an BG to an extent.
Like i said the instruments of old never really changed and were flawed in design for cosmetic purposes, there looks were considered as important as there sound, there playability never really came into it. There design was based in symmetry, there construction based on what they knew, and what they knew was based on the material available. So the option of a playable action was not even remotely close to what we can have today with the woods, construction, glues, truss rod technology, metals etc, strong and stable can be slim in todays world.....not an option to Stradivarus in his time.
As for a solo instrument or it being part of a bass drums job.............i'm sure others will deal with that point, but i will point out that when i was in an orchestra i had no bass drum note to change.
