said by cowboyro:
Realistically, how many electronic devices have you seen to last 25 years in harsh environments?
Would you consider civil aircraft and urban transit vehicles harsh environments? I do, and I've personally seen a significant number of 25+ year old electronic assemblies perform flawlessly and continue to operate at their original specification.
A better question would be, is anything built in the last 10-15 years realistically going to last that long? Ha!