Maybe you're focusing too closely on the specific example. It's interesting to me in the large for sure.

For one, since plugin permissions seem to be on the roadmap, users can expect to be able to write and run third-party code with a bit more confidence than if it were just another unix process.

Looking further down the line, imagine a pluggable web/native frontend for Zellij. At its most basic level of operation, it would still serve as a full terminal multiplexer, but it would also have the potential to do anything the containing runtime supports (render images, play video, render rich inputs/controls).

I wasn't imagining this before, but I kind of am now...