Another thing is that a lot of people do not want to be remote and enjoy being part of a group they can actually meet. For example I find pinging off ideas off

Another thing is that a lot of people do not want to be remote and enjoy being part of a group they can actually meet. For example I find pinging off ideas off each other and explaining things much harder on remote due to a lack of a whiteboard or a notepad. No collaboration tool I tried was even remotely a good substitue. I like the conversations I can have while taking a coffee. And going out for drinks with colleagues from time to time. I hate working alone in my bubble all day long. I like having the possibility to do so from time to time, but not all the time. As it was already mentioned in other comments time proximity is important. Managing things like pull requests or user tests over large time differences makes thing considerably slower. The whole premise of full remote is only valid for a subset of projects and team compositions.