It's an awesome little editor. I quit using it though because it seemed like the future direction of the project wasn't very clear, and from a practical standpoint VS Code simply has a better developer experience, but I had great fun hacking around it nevertheless.
One of my favorite things about rxi/lite and Lite XL is just how easy it is to write plugins. Simply create a new .lua file in the plugins directory and monkey-patch whatever you need. And while it might seem like monkey-patching isn't the most clean solution, that's not exactly true — the source code of the editor doesn't need to be cluttered with explicit hooks, and plugins interoperate with each other very well, because one plugin doesn't know about the others' existence. From its standpoint it just modifies the vanilla editor.
This extensibility allowed me to write some really cool stuff, the one plugin I'm especially proud of is lint+ [1], which leverages the immediate mode nature of the UI to draw pretty lint messages atop the text editor (and it even renders Rust's friendly compiler errors with little rails on the left! see issue #3 [2]).
Can recommend.
[1]: https://github.com/liquidev/lintplus
[2]: https://github.com/liquidev/lintplus/issues/3Nice!
You might like to show your work on that to https://twitter.com/ekuber if you've not already done so.
I'm using the mentioned lint+ plugin, but for example also the LSP plugin, which is extremely useful, and a lot of others as well.
I love how fluid the entire editor feels (mostly, sometimes there's a small delay e.g. when I close the last tab in a language which terminates the language server synchronously). It's also extremely nice in terms of scaling support (super fine-grained and high quality at any scale).
https://lite-xl.com/ is another one which is written in Lua. Brilliant and super fast. It is much more polished than Lapce but still rough around the edges with features though.
Another one is Micro which is cool too.
Either way I am loving the fact that new OSS text editors coming out.