I thought it was during the 80's and early 90's.

https://en.wikipedia.org/wiki/Acorn_Archimedes

https://en.wikipedia.org/wiki/Silicon_Graphics#RISC_era

https://en.wikipedia.org/wiki/HP-UX#BL_series

https://en.wikipedia.org/wiki/SPARCstation

https://en.wikipedia.org/wiki/NeXT#1987%E2%80%9393:_NeXT_Com...

https://en.wikipedia.org/wiki/BeBox

it was a joke. apple has literally made RISC desktops before (which you failed to link)

Indeed, but my list wasn't going to be exhaustive anyway.

uh, no.

Well, maybe... “ On Friday, September 1, 2017, after a round of layoffs that started in Oracle Labs in November 2016, Oracle terminated SPARC design after the completion of the M8. Much of the processor core development group in Austin, Texas, was dismissed, as were the teams in Santa Clara, California, and Burlington, Massachusetts.[4][5] SPARC development continues with Fujitsu returning to the role of leading provider of SPARC servers, with a new CPU due in the 2020 time frame.”

How long before 2020 Fujitsu rebinned SPARC chips are sold to OEMs for SPARCstations runnin’ popOS?

It’s not like System76 is going to be able to buy M1s (dang sounds like a weapon when you put it that way ) and Ryzen might not compete with near term successors to M1.