For me, I really want to get into niri, but the lack of XWayland support scares me (I know there’s solutions, but I don’t understand them yet).
Also, I stopped using Emacs (even though I love its design and philosophy with my whole heart) because it’s very slow, even as a daemon.
Lapce, an IDE written in Rust. It's nice and light compared to most IDE's, so I use it a bit on my aging laptop from 2015. However, it doesn't have the extension ecosystem or polish of my favored IDE, VS Code.