Come on, 16.7 was released in December and 16.8, with stable Hooks, was last week! It's interesting that React has added these features and it bodes well for the future but you can't claim capabilities that have only existed for the a few months is what constitutes "modern." React's pace of adoption has been remarkable but that also means there's a lot of code that already exists that isn't going to be changed right away to take advantage of these features.