UPS lifespans

/Neglecting battery issues/, any observations on the typical lifespan
of the electronics in modest sized (1500VA, sine, line-interractive)
UPSs?  Or, common faults?
APCs tend to be pretty ubiquitous, but they don't seem to be particularly
high quality (even the larger, more upscale units).
OTOH, given our relatively infrequent outages, perhaps its time to
just switch to "switched outlet strips", instead?  And, grumble about
the occasional "flicker"?  (most of my machines can bridge brief outages
on their internal power supplies)
Or, deploy the even larger units to handle multiple loads?
(sigh)  More frigging work...