I rewrote micro-panel (the “admin panel” for this site) from scratch with LitElement and no material design components. It’s really tiny now! The minified bundle is 57kb (and that still includes a code editor with syntax highlighting). The previous version was nearly 1mb.
Also, the new version is a bit simplified: no iframe mode, only cookie auth. And it doesn’t wrap the whole page in an element, it’s now more of a set of elements.
Check out this piece of code, by the way: