Comment by kjs3

I'm fairly confident there's more than 1% of people who care about these things

If there were an economically viable number of people who cared about those things (and it would need to be significantly more than 1%), we'd be running SPARC or POWER or maybe SuperH derived systems, all of which have open source, royalty free implementations.

For example, OpenSPARC is something like 20 years old, and covers SPARC v8 through t2. SPARC LEON is a decade older, and is under a GNU license, and has been to space.

And that doesn't consider going the Loongsoon route: take an existing ISA (e.g. MIPS), just use it, but carve off anything problematic (4 instructions covered by patents).

It's a pretty inescapable fact on the ground that in the 'processor hierarchy of needs', an open source license is of no consequence in the actual market.