Yeah, I’m very familiar with them. But they never really were a framework specific platform or at least did not go in that direction very long. Now they are explicitly a framework agnostic PaaS.
They were Ruby only for years...
Like, we had Rails and could deploy to Heroku before Nodejs even existed...
It was strictly RoR for a long time
being language or framework specific is not make sense either, do you rather have bussiness that tied to 1 framework userbase vs multiple framework supported platform????