> Creative jobs have always been boom or bust ...
> That was fine for centuries...
I always assumed that this was an artifact of recording technology: if you can record a movie or music, then you can have a handful of actors and musicians service the entire world, but without that each city needs its local musicians and theater troupes. If that's correct then we've been in this state for maybe 1 century.
For writers though it's been centuries, since writing enabled distribution of content in many places.
As for quality, it's all opinion, I guess, but the only form that seems to have gotten better recently is prestige television, but even there I'd say it so far peaked around 2010. Film and pop music peaked in the 60s and 70s. Instrumental music, literature, and painting peaked centuries ago. Artists have created perfectly good art for as long as humans have existed without the need to track their consumers private behavior to develop targeted ad profiles.