How true! I'm in the photography / video business and always finish projects before any upgrades. Although I write some music for my own commercial video projects it's not mission-critical.
That said, I never fail to be amazed with how so much music software trips up at the first hint of any OS changes, with upgrades often taking months or years to appear, compared to photography and video tools which often get upgraded within days or weeks. Maybe it's a much smaller market with smaller resources? This is obviously a very subjective view, but I've seen it so many times.
I know Apple and others seed beta versions of new OS's well before release but maybe they could do more to support developers who still clearly struggle with the timeframes? We'd all win then!