Which audio software developers are you talking about ?
The ones that are given a chance in June each year to preview the latest OS like all other devs, but decide to turn a blind eye while most indie devs get to work and release steady updates over the summer ?
And then, when asked in September if they're gonna be ready on day 1, reply "you know, there's not even a release date for this new OS thing yet". And then, when the new OS drops in October like clockwork, e-mail their entire user base with "OMG DON'T UPGRADE ! THEY DROPPED THIS BOMB ON US, WOW, TOTALLY UNEXPECTED, HONESTLY ! We'll check this out and let you know maybe, in the meantime DON'T UPGRADE !! APPLE BROKE STUFF AGAIN, DAMN APPLE!". And then, in December or January if you're lucky (or never), finally release a compatible version. Rinse & repeat for year n+1.
Or, maybe you're talking about those audio software developers that were given "only" 2 years notice that, ELEVEN years after macOS 10.6 introduced 64-bit support, it was finally becoming mandatory in Catalina. But they still decided to wait until it was released to believe it, like rabbits in headlights. Tough...
Seriously, audio software developers are the worst. They only get away with this behavior each year because musicians are some the most conservative and risk-averse userbase you can have. If you go to forums like Gearslutz.com, you'll find people asking you in 2020 if it's now safe to upgrade to macOS Sierra, or how to downgrade a brand new MBP to 10.13 because they don't "trust" the new stuff. It's utterly depressing.