All prior versions of QB Desktop will still work. Certain features, like importing bank and credit card transactions (if a .qbo file, not an .iif file) no longer work.  So for many client's we can still use QB Desktop (2021 was the last year before the monthly subscription).  But for those clients that you need to import info, you either need to go to the online version, the expensive Enterprise version or get a 3rd party app that converts .qbo to .iif or .csv.