Hah, thanks for resurrecting! I have a similar question about how long I can expect the frozen BB on my '93 Stumpie to last. I apparently waited a bit too long for servicing, LBS broke the vice trying to remove it.

I've decided to just ride it until it dies, and then maybe bore it out and make it an e-bike. Kind of curious how long it will keep going, and how I'll know it's finally given up the ghost.