There's plenty of ways to securely multiplex Ethernet devices. You don't give your web server read access to all TCP ports being used by other services for example. You only let it open the HTTP ports. There are of course ways for debuggers to escape this and intercept all TCP packets sent by the kernel, but those require elevated privileges.

Sway is in top-up form and is basically just i3 on wayland. Even the config is largely compatible, so do give it a try, if you haven’t (recently)!

I tried it not long ago. It's ok, took me some time to overcome some issues but got it to work, then, when I started actually working I met the same issues regarding screenshots, remote control/screen sharing and decided to stay with i3 while I can.