It wasn't just the chip, it was the whole ecosystem.
Could an every day consumer buy a Sparc motherboard, chip, and build their own system? No. There may have been one or two vendors that did that late in the 90's, but they didn't stick around.
Could an every day consumer buy a Sparc motherboard, chip, and build their own system? No. There may have been one or two vendors that did that late in the 90's, but they didn't stick around.
I later worked for a systems builder that built and sold Sparc/Ultrasparc systems for government (eg. Hong Kong Mass Transit). We were the only vendor in the Southern Hemisphere doing it. So it wasn't common. But yes you could order parts from Sun Microelectronics and build your own systems, and it became easier use certain standard PC compatible parts once they standardised on PCI. We had shelves full of the older incompatible MBus compatible systems and boards as well.
Yes:
It appears there is a Linux kernel port: https://www.gaisler.com/products/linux-for-leon
I'll give you the benefit of the doubt that you can load a Linux distro on there. You have a couple other problems: there's no ethernet or wifi, and you only have 512 megs of RAM.
"Consumers" can be running it just as much as "consumers" could be running Raspberry Pis, which could also be considered 'embedded' by some. SPARC is no less (or more) proprietary than ARM: you can license the ISA, fab a CPU, and sell some kind of hardware stack.
Do you think it would be more or less difficult to get a license from Intel/AMD for x86(_X64) than ARM and/or SPARC so you could fab your own chips?
But yes, you are correct, it's much easier to get a SPARC license.
Not someone looking for rad hardened boards with flight qualified bootloaders...