UC Berkeley's intro to computer architecture course still uses MIPS for projects and exam questions.
https://pages.cs.wisc.edu/~larus/spim.html ... and apparently its being kept up to date https://spimsimulator.sourceforge.net with new builds about every other year.
(I took the class from Professor Miller in... '92... Operating systems in... '94? 95? was from Professor Larus)
Stanford was MIPS.
Not sure if they still use it as I graduated from there back in 2020