Always worth thinking about what “free” means. I think there is something in the idea of teachers exploring software, finding possibilities, testing & playing with pupils and evaluating. As opposed to using software designed for education by big tech.
You really should follow Ben. Reading his research strongly influenced the way I currently about EdTech. Quick adoption of new ‘free’ tools can be a dangerous path to tread. I have been guilty of this in the past. Beware of shiny digital buttons!