Thanks for the names that you provided. I'd say these are examples of people that had some success and then pivoted to become session / touring musicians for other (very famous) bands (though one is a Grammy award winner in their own right). I suppose it is possible that there will be fewer people like that in the future. I guess we will see.

Perhaps the artist in the article could similarly pivot. At least, that seems to be the main way to stay in the industry if you are unable (for whatever reason) to attain commercial success.