Computer music is as old as computers, live coding is pretty old too. (I posted this in the strudel discussion too: https://toplap.org/wiki/HistoricalPerformances) Maybe everyone doing live streams during the pandemic helped get visibility for live coding? It's interesting to see it kind of becoming popular now.
classic overnight success 20 years in the making. many such cases.
I must say the narrated trance piece by switch angel blew me socks right off, to me feels like this should be a genre in itself.