I'm still going through my list as well, but some things to note:
MAME got rid of the "TESTDRIVER" designation, which is why you see a lot of non-working games . . .
OTOH, MAMEdev is pretty inaccurate, as one of the nice features of EmuLoader is the "Preview in MAWS" view. I am finding a lot of non-working games where MAWS - based on History.dat shows 0.99u7 - Fixed remaining errors, game now playable - but MAME 0.100 still outputs the games as non-working.
BTW, there have been some gems added - G-LOC, Blitz, CalSpeed, SFrush, but I don't know (yet) how playable some of them are on current hardware. . .