As mentioned in the story, everybody with a 68k or RISC computer in the 1980s tried their hand at making a Unix workstation because the market was so lucrative.
In addition to Commodore there were Apple, Acorn, and Atari also making these upscale plays with Unix. Sun and NeXT were native to this market. And non-Unix workstation vendors like Apollo were adding compatibility.
It was a crowded market and Commodore didn't bring anything unique to it. The Amiga's multimedia strengths were practically wasted running X Windows.
Nitpick: This was the 90s already. 68k based Sun gear was in the 80s but 90s was the RISC era already for Unix boxes. (except for NeXT I, they continued launching new 68k models into the 90s and got left behind)
GCC was largely ignored until Sun became the first UNIX vendor to have different SKUs for developers and plain users, quickly followed by other vendors.
Only then folks started reaching out to GNU, as means to avoid paying for UNIX developer licenses from their respective vendors.
Sun even had multiple levels, one of the reasons Ada didn't took off, was that UNIX vendors like Sun had it as an additional SKU, the developer license would only get the classical UNIX stuff, alongside C and C++ compilers.
In addition to Commodore there were Apple, Acorn, and Atari also making these upscale plays with Unix. Sun and NeXT were native to this market. And non-Unix workstation vendors like Apollo were adding compatibility.
It was a crowded market and Commodore didn't bring anything unique to it. The Amiga's multimedia strengths were practically wasted running X Windows.