I see that over the past 11 years or so, since at least 2014, people have been trying to port #Illumos to the #RaspberryPi. Unsuccessfully, presumably, given that none of #OmniOS, #OpenIndiana, or #Tribblix claim ARM support and all of the porting projects seem to have stalled.
Only one of those, Tribblix, even has any non-amd64 support, which is quite a contrast with the SunOS origins.
http://tribblix.org/relnotes.html#m32-sparc
I wonder why the port attempts have failed. Illumos surely cannot be that tied to the Intel Architecture.