I like this thread a lot. My own feelings & experiences on the matter have been pretty well covered as common to most of us in other posts. In short, I need to hear myself & be heard, with as good a tone as possible. If I can get away with playing acoustically (rare), I will. Otherwise, I have no pressing desire to risk that toneless, strangled thunk (beloved of non-bassists) from old albums in a vain effort to be heard. It seems to me that a lack of amplification can often be the leader's doing rather than the bassists choice - which is real nice if everyone is on board and adjusts for the music's sake & aren't just on some "authenticity" trip. Still, it kinda irks when a non-bassist effectively sets themselves on a pedestal of greater knowledge of bass technique/tradition than any amp-using bassist (you know, like Ray Brown, Ron Carter etc...)
