Yes, of course. However, you refer to the lack of diversity in operating systems, but monocultures in providers/ASNs is another danger we should be conscious of.
These calculation don’t show the situation as it currently really is - unfortunately:
About 32 out of these https://metrics.torproject.org/rs.html#search/nifty relays seem not to get counted in ASN nor in cw-fraction (probably because as in this example https://metrics.torproject.org/rs.html#details/609E598FB6A00BCF7872906B602B7... AS Name and AS Number are unknown).
But they are about 15% of total Exit https://github.com/nusenu/OrNetStats/blob/master/allexitfamilies.md - that seems kind of monocultures?
Paul