MUI is a third-party hack and rather slow and ugly IMHO, requiring many extra files and not giving any benefit over ReAction. Another case of reinventing the wheel for no real purpose and forcing users to go download and install extra packages instead of using what is already present in the OS.
I pretty much expressed the same sentiment about MUI (especially the bit about having to track down files, being slow/ugly) and got flamed for it. Glad to see I'm not the only "uninformed" AmigaOS user or whatever I was called that day. :lol: