The 1979-2005 build window across this area means a lot of New River's openers were installed once and never touched again until something failed. That's not unusual, but it does mean the failure, when it comes, tends to be sudden - the board finally gives out rather than degrading gradually - because nobody was replacing capacitors on a maintenance schedule.
The severe heat classification for this service area compounds it. Every summer, the garage interior sits well above outdoor temperature, and an opener's electronics are not built to run at that heat for two decades straight. Board failure rates climb faster here than they would in a milder climate, which is part of why an opener installed in 2002 is now past the point where most manufacturers still support it with parts.
This is not a story about a rare local weather event or anything dramatic - it's the ordinary math of heat cycling on aging circuit boards, repeated for over twenty summers on the same unit.