this is a great point...further down the comments, an OpenTF maintainer made a great point that all of these services are "backend hostable" services. Terraform doesn't even have a backend service component...Terraform Cloud does, but not Terraform itself.

I didn't contemplate this when writing the article but it seems like this might be a pretty big factor in the reaction to the change. At least to my memory, I don't remember as strong as a pushback from any of these companies changing their licenses