Good question. It’s unlikely to be supported out of the box, without modifications to Atomic Scribbler.
The issues I see at the moment are that the main Atomic Scribbler project window is usually the second window that opens, not the first. You click on the project name inside the Project Manager and that then launches the second window. If a project were pinned to a tab set then this would need to work differently.
Second issue relates to the fact that a project cannot be opened twice at the same time. If issue 1 were dealt with, you could then have a situation where the same project were linked to more than one tab set, leading to a problem. This wouldn’t be a problem for browser windows, explorer windows, etc. Which is what the new Tabs are being touted for.
But it’s early days. I’ll have to see how the tabs work in practice first, and who’s using them.