SE upgraded to SE/30: no issues, other than working out the art of SCSI chaining some years back.
PB520c: no issues
PowerMac 8500: no issues. Ran Yellow Dog Linux, OS X
PowerBook G3 Pismo: no issues
PowerMac G4 Digital audio: no issues
MacBook Pro: no issues
I still have all of them except the 520c. MBP is in daily use, the G4 occasional use.
Accessories:
15" Apple AV (CRT) monitor: no issues
17" Apple AV (CRT) monitor: Got fuzzy towards the end
15" Apple Studio Display (LCD - Bondi Blue): no problems
15" Apple Studio Display (LCD - Graphite/DVI) no problems
15" Apple Studio Display (ADC): no problems, using with my G4
20" Apple Cinema Display (ADC): no problems, using with my MBP
Still have all of the LCDs, though only the ADC ones are in use.
AirPort Base Station (Graphite): Had to fix the capacitors, but still working.
AirPort Extreme Base Station (white, conical): still in use today.

