You will have even more fun with your time if your “in-place” goes south. I have never and would never - ever - attempt an in-place upgrade. And trust me - you will have authorization issues - despite your belief that it will be smooth. I have seen many a VSTi and their auth go wonky when a new OS suddenly “shows up” unannounced.
Not to mention OS issues if something is out of wack. And finally all the crap that will be left over AFTER an in-place - which can old slow things down eventually or cause major problems if an app or instrument decides to call the wrong .dll - that just happens to be sitting in some obscure directory.
I too have at least a couple days worth of auths to do…but I have no problem wiping the machine every 6 or 8 months and starting minty fresh. It’s liberating to gut the machine.