There is Another Open Source CPU...
AFAIK IBM make their POWER CPUs open source in some way or other. Which is a pretty big piece of very complete chip design available to all and sundry. There's the OpenPower foundation, and Raptor are doing a server that's completely open source, from the chips / firmware upwards. Very commendable!
So wouldn't it be superfluous to add too much to RISC V, to end up with two competing open source server chip designs running Linux? After all, it's not like POWER 9 is lacking much.
Biting the hand that feeds IT
