I specifically try to keep the number of physical books I own to a minimum, mainly by borrowing and giving away/selling them. I also moved some two years ago, that’s alway a push to “diet” more.

This being said, I still have way too many books. I’d guesstimate some 120 leisure books (read some 80-90) and some 20 work books (read/studied all of them). Some 50 virtual ones, read all but two I’m currently reading.