I don't know. I know that nothing digital is truly permanent outside of like CD-Rs and Project Silica, but websites you own tend to be way, way more permanent than services like Xanga, MySpace, old LiveJournal, etc. and I don't see how Medium, Substack, and their similars also manage to hang around.
It's the age old 'control of technology vs convenience of content authoring'.
It's the age old 'control of technology vs convenience of content authoring'.