RE: aging receiver failures....
G'day
I have use Hitec gear for ages and have only had one failure and that was after a crash. It was a very old (about 20 years) Challenger receiver.
I have had three JR receivers fail but again, each time it was after a crash. The most recent one seemed to be fine but failed about 3 minutes into the test flight of a repaired model.
I have had no Hited or Spektrum 2.4 gig receivers fail though a friend gave me a Spektrum Rx which does not work on its Throttle channel. Everything else works. I don't use it.
Mike in Oz