It's really hard for me to fully admire the above motivations. In AmigaOs times, I had a system I understood completely, pretty much every corner of it, so I could exactly do what I wanted, and I had a community around it. Nowadays, Linux has taken over and replaced this, to some degree, even though the complexity is higher. Anyhow, with enough effort, one can learn the inner workings of the system and set it up exactly as one wants it - and that's not possible with Windows. Plus, there is also an active community, but its much larger, and it is harder to keep on track, but yes, there is.
Nowadays, I get either a modern system with a modern Os on it which I can face and configure to my linking (Linux), or I can get an old system for the nostalgic feeling of it (Amiga), whenever I want to look into some old programs, old musics, probably some of the old pictures from DPaint, whatever, and the NG systems are not a completely adequate replacement - they offer a different "quality of experience".
I don't quite get the point why there's any room between the two for anything "more novel but still obsolete", and PPC hardware *is* obsolete, either because it is old (MOS) or because it is "obsolete by design" (AOS). If I'd like to reach out for the Amiga community (rarely these days), there are still the 68K machines, so I don't need them for that. If I want modern applications or more computing power, these machines don't offer that either due to lack of compatibility. If I need a specific application, it either runs on the 68K anyhow because it's a legacy Amiga application, or it runs on Linux on a PC, or under Windows. There's nothing "unique" about MOS or AOS software in this respect, there is no "killer application".
I also admire that there's probably some need to modernize the old hardware in a very careful, backwards compatible way to keep the software working - simply because the hardware is aging and will fail to function at some point. That's quite the same as restoring old cars. I can follow this motivation as well,
But neither AOS nor MOS fit into this picture. Both are incompatible niche systems which do not offer an advantage for either modern demands, or demands of retro computing.
Anyhow, we don't need to carry on the discussion, I'm probably too old, or too young, or something else got lost on the road, I don't know....
When I was A1200 user only (still have few classic amigas), I learn how to use LWave, ImageFx, FXPaint, Pagestream etc.
For me MorphOs is excelent OS because I still use same software (without UAE) and speed is awesome. Before MorphOS, I was try to use Windows, MacOsX, Linux (Ubuntu, Puppy, etc.) with UAE.
Just to do same stuff with same software. I hate to boot one Os, waiting for updates of antivirus, java, browsers before I can start UAE.
Linux is nice Os, but I don't have time to learn about billions folders and files. Also I don't like when Linux wanna be smart and change something which was working perfectly. (gfx, monitor freqency, etc.).
So I found MorphOs perfect for my needs. Why? Very fast respond unlike everything on non Amiga systems, same software, and few modern applications which covers web, movies, etc.
If you count that after 10+ years I spend only 300 euros for my "new" computer and OS, and zero on X86 stuff, I found my joy as smart move.
Only minor problem is when I show my work to some people I got respone...oh nice, you know how to use Photoshop. How to answer that?
