Totally agree. One day the depth sounder function in my GPS/Sonar was working perfectly - next minute it started winking, (something it has done before), but this time all the tricks to get it going properly again have failed. Fortunately I have triple redundancy in sonars. And yes, I did 'soft' and 'hard' re-sets etc.
Then there is the remote control to my trusty(i.e. 25 yr old) Yamaha DSP 100 sound surround module, which worked perfectly all these years, (often neglected for long periods), worked fine one day, then not the next, and nothing will revive that either. Fortunately it has manual over-ride, as there is no way I'll get a replacement now, but it's just pain having to get up to it to adjust each time. (Yes, of course I've replaced the battery, cleaned contacts, etc, etc.)
Up to now have not been motivated to try some of the rather drastic remote rejuvenation tricks one finds with Google…anyone else..?