I migrated a business’s site from WordPress last year (a site that had been around since only 2018, I believe). I was surprised to discover how awful all this stuff was in WordPress’s export (… which was also very misleading and limited in scope). In order to not ruin large amounts of content, I had to dismantle that Gutenberg comment stuff (where present) with its strange mixture of structure and presentation, and also port the old-style wpautop function, which is obviously a total disaster of a concept that has arisen from bad technical decisions being made at several points in its history, combined with caring about backwards compatibility in mildly weird ways. The fact that it didn’t even identify what was Gutenbergy and what wasn’t, but basically just treated the whole thing as a string from which you parsed what you could and shrugged your shoulders about the rest was severely off-putting.
