The adode can surely add whatever extension they want to address whatever problem. But unfortunately, most implementation outside of Adobe acrobat itself won't

The adode can surely add whatever extension they want to address whatever problem. But unfortunately, most implementation outside of Adobe acrobat itself won't implement all of them. Most library would just implement basic part for printing and marking (At best, supports forms and javascript). That part is basically non-exist for anyone. There is a reason that most people still use docx for forms even pdf technically support forms. PS: pdf reader of firefox and chrome don't really supports forms until very late versions.