"what it doesn't have and that VSCode and Zed have is the ability to edit files on a remote server with only an ssh connection"

I thought Zed required a zed server on the remote machine for that. Docs seem to suggest so:

"Remote development requires two computers, your local machine that runs the Zed UI and the remote server which runs a Zed headless server. The two communicate over SSH, so you will need to be able to SSH from your local machine into the remote server to use this feature."