I'm not mad at this at all. It probably runs with like 20kb if RAM.
I realize the author is probably just having fun, but if a few modern features added to this and I would probably try it.
Multi cursor, a little terminal window, some way to do code hints or intelligence. This would be a dream boat lol
A year or so ago I spent half a day writing some Rust on an actual DEC glass teletype (VT520) connected to a Debian box. I used vim and shell job control (^Z, jobs, fg, etc.) to switch between tooling and a persistent text editor. It made me feel things.