data point: I was recently in the same zip code as a set of these things, in the parking lot of a Pakistani restaurant. A friend was handing over his wife's old bike as a "loaner" as my wife's bike was stolen (see other topic). Anyway, it has suicide levers and, as I had not been around them in a while, was not careful. Pinched my hand just getting the bike out of his minivan!
Well, they go, for sure, as soon as I get near a shop for "short barrels" and gee, thanks to this topic reminding me, a set of hoods. The SL's go into the dumpster along with the front and rear frisbees, reflectors and anything else I can unbolt.
And if the bell bottoms do come back, I recently saw my 1960's Terry trouser bands (the good thick ones) in my bottom drawer.