I've been trying out Lite XL, and I have a crude (WIP) plugin that can pipe selected text thru any shell command (sed, sort, etc), and either output to a new buffer, or replace the selection. Then I started writing some scripts to supply the commands I miss from Emacs, like align-regexp. Since it's just shell commands, you can write them in any language.
I'm not sure if I like Lite XL, but the scripts I already wrote would be easily reusable in any editor that supports piping selections. Perhaps it would be a fun project to create a collection of such portable scripts, sort of like what LSP did.