I've had this saw for about 30-35 years and its passed the test of time. I have always worried about the electronics going bad as parts are non existent any more. If the electronics does go out, there is no manual wheels to adjust by hand. I don't even think it can be converted to regular cranks. I haven't tried it, but there are nuts on the each motor shaft that I think you could put a socket and ratchet and adjust it by hand. Being worried about the electronics for years is what prompted me to buy a second complete working saw for parts if needed.
I have always loved this saw. The Up and down digital readout accuracy is great, but I really don't need it saw for that. What I really like is if I'm making a project and cutting odd degree miters, I can keep track of the degrees, come back 6 months from now, punch the degrees in to the computer and it goes exactually back to that angle. Hopefully I will never need the saw I bought for parts, but it easier to sleep now.