The word "any" there is mildly misleading about the JSON things, since there is now SQL/JSON which PG supports: https://www.postgresql.org/docs/13/functions-json.html#FUNCT...

It would be horribly painful to stick to _just_ SQL/JSON for manipulations, and I have absolutely zero idea what the coverage is in other platforms, but portability isn't completely off the table like it used to be