Most of it should work OK.
I have used much older MS 100/1000 (rated at 100). It was perfectly neutral in daylight, and the exposure was fine using the sunny 16 rule. It is a nice, plain-looking film that seems to have a very wide dynamic range at 100. Reminds me of my prints from Pro 160S, actually. I have not tried pushing it, as I do not trust any lab to follow the instructions for how to do it.
From experience with old films, I would say that the negative films may have lost some speed, but the transparency films might be remarkably close to how they originally would have looked. The ones with the most problems will probably be the stuff from the '90s, and the Portra 400 (although I have got good pix from older Press 800).
I would start by shooting the neg. film at half box speed, and see what happens. If it is too dense and grainy, you can probably go back to using box speed. If it is thin and washed-out grainy, you probably need to downrate it even more to get some use out of it.
For the transparency film, I would start your tests at box speed.
Obviously, test first.