What is the Cosmic GUI contribution philosophy relative to existing legacy projects?

[yekibud]

I've got a question about Cosmic GUI contribution and dev: I couldn't find any discussions about the philosophy here. Long running GTK apps can obviously run on Cosmic, so is the idea that contributors running Cosmic should continue to contribute to these projects and GTK apps will forever be a part of Cosmic, or is there a problem with that and the idea should be to gradually replace legacy GTK GUI apps with Iced/libcosmic apps. And, if so, would it just be for a little more seemless aesthetics, or are there significant issues with some of the legacy GUI libs that will pose a problem for continued dev on Cosmic? Or significant features they would be missing out on?