It's a good distro and I like it. It's easy, it has good accessibility, and as you say, it looks great. But I tried daily-driving it for a short time and found it too limiting for me. Once I'd manually installed Firefox, Thunderbird, Chrome, VLC, LibreOffice, Ferdium, Panwriter, VirtualBox and my other everyday tools, I wasn't using a lot of the distro's own tools any more, and suddenly the ones I was (settings, file manager, app launcher) became limiting.
Mac users looking to switch want the whole package: the aesthetics, the functionality, the design philosophy, and the holistic approach.
I recently began porting Ladybird from QT to GNUstep and the results are a 20 minute build on low powered raspberry pi vs 3 hours using most of the same APIs from AppKit. I believe I can take the same code, and make it build on Windows. I suppose this is my elevator pitch as to why.