Word count! Yes, that again! :D
I thought this Twitter thread on word count/length for debut epic fantasy books from James Long, one of the chief editors of Orbit Books, an industry leader in fantasy publications, might be interesting. Especially since we're often told that any book over 100k is problematic!.
His 'rule' only applies to debut novels, traditionally publishing, and specifically epic fantasy, although he does say that it applies to 'space opera' as well. He is (as you'd expect) more concerned with the overall quality than the length, but is generally looking for books between 125k and 175k.
As he says... length can always be fixed!