About the UPX, the size of clojure-lsp was reduced from 107MB -> 29MB with a drawback of 300ms on the startup

I'll do some tests but the trade-off for clojure-lsp looks good

Probably will use this action on the CI: https://github.com/svenstaro/upx-action

Does it work on all platforms?

the action say it does, I'll test if it works nice with graalvm compiled binaries yet