Alacritty and Zellij work wonderfully together. Alacritty is a Rust-based terminal emulator that renders via the GPU, is configured via a TOML file, and has no UI other than basic window chrome.
Zellij steps in as a modern tmux replacement, allowing easy creation of terminal panes and tabs, with lots of additional features that I'm ignoring right now to allow me to settle in with it as a tool!
Then Helix jumps in as a Vim replacement, with first-class Language Server Protocol support, with default LSPs for many languages.
I'm enjoying the combo as a simple setup for vim-like editing that is close to VSCode/Zed language integration w/o vim-like plugin handling woes