More to the point, although the T90 was seen as a massive, possibly revolutionary camera, many of them are prone to electrical failure nowadays and constantly trying to keep up against that is getting tougher as we roll on further into the 21st century. Camera engineers can keep a 40+ year old Spotmatic going just fine, but when a circuitboard is kaput, it's time to start digging the T90 grave. Some are pushing 25 years now, electrical failure, LCD bleed and eventual failure, and after all of those - there's still the distinct possibly of mechanical failure, especially if you pick up one that has had a hard working life.
This wasn't trying to stoke anything, it's all valid concerns (and IMO why a T90 shouldn't be recommended).