I'm also a bit lost after scrolling through it. It seems if we take this one step further and add a bit of syntax to HTML to be executed on the server you'll have invented PHP / WordPress right?
AFAICT this is another cycle of; a decent system becoming overcomplicated because someone wanted to make it multi-tenant, and the re-discovery that 90% of the "improvements/advancements" are essentially bloat in the context & freedom you find/create.