Question Will UIElements (UI Toolkit / UI Builder) ever replace UGUI?

Hello,

I find it quite ironic that UGUI was initially called "Unity's new UI" and now it appears Unity would maybe ditch (not sure if it'll actually happen, due to its immense flexibility and how deep it was already integrated in the editor).
I'm kind of horrified about this thought, because there are a lot of asset publishers that rely on it, including me..

So, any thoughts? If/When/How?