I dunno. Between my group of local WordPress techs and myself we support maybe five hundred small business sites. I’ll give you a nickel if more than two out of 500 have a use case gor collaboration that’s so powerful they would choose that over doing something/anything to improve basic user experience. I mean four years later it still takes 5x longer to train a user to publish a blog post with categories and tags using the blocks UI than it did with the classic UI. Blocks are… fine but the overall Ui still stinks.