There's no clean separation between those things. The weakness and inadequacy of HTTP(S) and other protocols actively funnels people into the centralised servic

There's no clean separation between those things. The weakness and inadequacy of HTTP(S) and other protocols actively funnels people into the centralised services of big providers. It creates a world where storage is brittle and content is ephemeral, both directly due to its own failings and because it pushes people towards big providers who increasingly like things that way; and so on. Now human nature would be enough to tend to draw a lot of people towards lowest-common-denominator options, but a system which makes the alternatives frictionful and downright painful doesn't help either.