A few months ago I sold a 96 Honda Prelude, it still drove like it was brand new, on factory suspension, the motor was whisper quiet and smooth. Before that I sold a 2000 Acura GS-R about 2 years ago, that was also in mint condition and also drove like it was still new, on factory suspension and motor was super strong and smooth. I never owned a Civic that old but they can certainly go the distance.
I never owned a boosted motor that long,only NA. I don't know what parts will eventually give out within 20 years on a boosted motor, something tells me they will need more repairs and maintenance.