I assume by Classic, you mean OS 9 in that during your Jag install you didn't bother installing 9.2.2?
I considered not installing it (OS 9.2.2) very carefully and in the end had to keep it (Quickbooks, Distiller, Commotion to name a few). I as thinking of running QB on a separate box with Classic, same for Distillar, but I just use them too often so it would get old scooting back and forth.
Classic on my box launches very fast, runs those apps very well (not Commotion, which requires 9 native, not Classic or I could get X upgrade, which I don't have yet), so it's not a big deal to leave around for another six months or so.
Believe me, I want it gone, but I just can't quite get there.