I have a Pismo G3, so running Haiku on that would also be of interest to me (and I hadn't seen Tabby-PPC before)... though honestly I'm probably going to keep that machine as the PPC OS X & Classic machine that it is. If I can boot into Haiku from an external drive, then maybe.

Also, don't dismiss what you're capable of with Opus / AI! I keep discovering I'm not being ambitious enough with my AI work. Not that I'm an expert or anything, but the models keep being more capable than I imagine, with enough coaxing. I keep needing to set my sights higher.