I think Alex learned his lesson offering a free version running OpenFaaS.
Also: it has to be free.
So yes you're right, people confuse VC backed companies, and vibe-coded pet-projects for sustainable software.
SlicerVM was started in 2022 and internal only, plenty of YouTube videos and such about it - written completely manually from our Actuated work.
There's a free trial for anyone who wants to play about on their Mac or Linux computer, the comment here is from a real user (unprompted) that knew and used free alternatives previously.