Yes, but many of them started that way, they didn't have to go through the headache of transferring to that format. And even ecosystems that did go through that

Yes, but many of them started that way, they didn't have to go through the headache of transferring to that format. And even ecosystems that did go through that trouble, they weren't nearly at the scale that npm is. We can talk about how awful of an idea it was for npm to start the way they did all we want, but the reality is that they are in the position of unscoped packages being the "default" right now, and I'd love for them to get away from them in a safe manner.