Earlier quoted context omitted.
I can promise you there are many, many professional musicians who will be first in line to upgrade their Mac. I’m a professional programmer it’s not like I test if my mouse or keyboard will work with a new windows update.
Maybe amateurs… Professionals tend to keep a stable system running for as long as possible. The first studio I worked in had a B room that was running OS 9 at a point where OS X had been out for 7 years. My current setup at home is a 2010 MacMini on v10.13, using a firewire interface. I plan to keep it running as long as possible.
I recently tried to reinstall an old MacBook 13" that had a hard drive replacement. I couldn't log in to perform the install, Apple servers were throwing me an error. The only choice I had is to put another OS on it.