new web browser for PowerPC Mac: http://www.floodgap.com/software/tenfourfox/
new OS for PowerPC Mac: https://voidlinux-ppc.org/
or, a new PowerPC computer: https://www.talospace.com/
new OS for PowerPC Mac: https://voidlinux-ppc.org/
or, a new PowerPC computer: https://www.talospace.com/
I continue to compile my Audio Unit plugins, to this day, on a 10.6.8 Snow Leopard machine specifically so I can release them as PPC/32/64 bit fat binaries. Far as I know that should continue to hold for everything I've done (not sure if it holds for the Mac VST plugins, though)
So that constitutes new audio DSP plugins for PowerPC Macs.
Though I don't use it day-to-day, I've got an old G3 (?) Mac laptop. It does indeed have a better keyboard than modern ones… and from an audio production standpoint, it may not be up to high sample rates but it's got digital optical in AND out, standard. Just plug an optical cable into the headphone or mic jacks.