There's plenty of hardware Windows 98 no longer works on Mike.
Just tried it on my 2012 mac with Fusion Player 12.1.2 the other day. Windows 98 does no longer boot. Worked fine on Fusion 8. My guess is that it needs Binary Translation support and that's not available with 12.x
edit:
My bad.
Figured to see if I could find out why. Upgrading from virtual hardware 4 to virtual hardware 6 seems to help.
(yeah yeah, it's an old VM)
edit 2:
With some of the more recent AMD processors however you are out of luck, they really need BT.
Just tried it on my 2012 mac with Fusion Player 12.1.2 the other day. Windows 98 does no longer boot. Worked fine on Fusion 8. My guess is that it needs Binary Translation support and that's not available with 12.x
edit:
My bad.
Figured to see if I could find out why. Upgrading from virtual hardware 4 to virtual hardware 6 seems to help. (yeah yeah, it's an old VM)
edit 2:
With some of the more recent AMD processors however you are out of luck, they really need BT.