It's going to depend on how YOU use the gun.
Other people, who use the gun differently, will have drastically different wear patterns.
Let's say YOU live and die by the Bill Drill or any thousands of other high speed shooting events. Your patterns of wear/failure/replacement parts will differ greatly from shooter #2 who only fires his gun for fun at the range, no real speed involved.
Add shooter #3 who fires very heavy handloads, single action only at deliberate pace.
#4 shoots a hunting handgun.
Skip ahead several years and you'll have:
No parts needed.
Gun got excessive endplay after X number of years.
Gun needed "this" to cycle reliably (fast).
Overall modern revo's are pretty solid but you (and your use) can and will wear some parts much faster than another user. It's like a car, you practice launching fast from a stop,,, you'll need a clutch much faster than a guy who just likes to cruise at 95mph + on the freeway.
Expect some wear replacement (unless your use is light), there are people who'll fix what's needed, videos will make some of those fixes easy for a mechanically inclined individual. It's not a "universal" expectation it's use specific.
L-frames endure in my experience much, much longer than K-frames, but if K-frame meets your need? Just do the maintenance as wear occurs and be happy. All mechanical devices require maintenance at some point.
If car owners were like some shooters, their ride would last forever, others will need some stuff done from time to time
ETA: maintenance in a revo isn't a sign of abuse, it's a sign of heavy use in one form or another.