For me the the issue with upgrading is that when you buy a piece of hardware, specifically DJ gear (Serato), mixers/interfaces, etc; the latest and greatest often doesn't support it. Then you are hoping and wishing for the company to create drivers to support your expensive hardware on the latest Catalina OS upgrade. That's why when you see interviews with many musicians that have home studios, the computers aren't the newest. Once you have a stable situation that works, why change all the time?