Yeah, I've tried that with vim windows. It wasn't to my liking.
> your all shell interactions are within Emacs buffers, which give powerful workflow advantages if you want to refer to previous results, or if you want to do some ad-hoc scripting.
I'm not sure I'm understanding the advantage you see. I use named tmux sessions that survive beyond terminal closing that I reconnect to. I have history for months in those. I can use two of those and have an editing window and a window to see compile/test results. If it's a remote connection and the network fails, I just reconnect and reattach the tmux session, and I'm in the same position I was, with the exact same screen shown and history. I can move from home to work with the same amount of easy as well.
Since I would run tmux anyways just for that capability, I'm not sure the benefit I get out of folding both those windows into the editor, other than harder to manage resizing, and harder to manager if I want to add or remove windows temporarily.
I'm not sure what making the buffer part of the editor is gaining there specifically, but I think there is something that I'm not gleaning from how you're explaining it. I'm just not sure it's enough to counteract the pain of in-editor window management (for me).