I throw some spitballs i’ve used based on high volume shows etc
After about 1000 plays i expect flipper degradation. Usually in linkage and stops.
Bushings seem to be good for years unless they outright break. I would still find myself replacing them within 2-3k plays probably at home. I have route games with more plays and oem bushings with no need to replace yet. This is probably way more game-specific.
Just thinking back to unscheduled replacements of late… i’d still probably pin it at about 1-2k plays when a sticky flipper complaint may come along which involved a coil stop/plunger.
Linkages are harder to say as they typically get swapped early with a plunger swap out.
Sorry to that precise… just some anecdotes from our general behavior. As much as i keep trying to keep game logs… it never continues