All channels will eventually burn out and fade, but the youtube model guarantees that there will always be new shiny content.
My favorite band from that time is ABBA, if only because they totally rocked these cat dresses, which would have made a killing on etsy if the internet existed back then.
https://www.theguardian.com/music/2018/apr/27/abba-announce-...
He stuck to his usual content and his margins just keep increasing since there's no added costs for a higher viewerbase.
Having a career.
It's very rare for someone to last decades as a performer in the entertainment industry, and online content moves faster than most. You don't want to suddenly have no audience age 35 with zero skills or experience outside making potentially niche YouTube videos.