FixOldCameras mainly focuses on cameras from the 70s and earlier where electronics are nonexistent or fairly simple.
Late-90s cameras like the Nikon F100 are a different beast entirely. The only thing worse are probably compacts from that era like the Olympus mju. If something goes wrong there you can essentially give up on fixing it.
Actually the 90s ones are generally terrible They are really complicated nests of parts and flex PCBs and cables. Unlike the newer ones, there's usually some older style stuff in there just to screw with you like soldered joints on inconveniently short single wires and glue.
I agree.
For me, the details of the Fix Old Cameras videos were less important than the approach and attitude applied to the problems.
But like I mentioned, I am not down the camera repair rabbit hole anymore. In part because of the intractability of many camera repairs.