There's still a reasonable PPC Mac/Amiga hobbyist community, many of whom will tell you about how much purer PowerPC is compared to the evil ugly x86. As someone who does PPC Linux kernel work the pragmatic part of me would like to drop support for a lot of these older machines, but as long as the machines are still actively used the support gets maintained.

There are newer PPCs as well, like the Talon motherboards.

Currently there's an ongoing project to create a free and open PowerPC laptop based on NXP T2080 for non-x86 hobbyists. I've donated for this project.

https://www.powerpc-notebook.org/

Indeed - the Talos machines are the first new PPC desktops in quite a while. The IBM POWER CPU series is far from dead, just post-Macintosh / PS3/Wii/XB360 consoles, it's not really something you see in the consumer space any more - apart from Talos, which I'm pretty excited about.

(Disclosure: I work for IBM.)

Sadly too expensive for anybody to bother.

Yes, it is the best commercially viable ISA on the market for servers.