I actually bought a license a lot of years ago because I had been using it for many more years already, always clicking that nag screen away, and some day I realized that I would be totally hosed on Windows if there was no WinRAR because it really is the only compression tool that packs good format support with a bearable user interface.

7-zip is okay on the format side since they added some of the newer high-efficiency compression algos, but the UI still sucks compared to WinRAR.

...there's a 7-Zip UI?

I take it you're doing more than is offered in the right-click menu?

Sure. Replacing single files deep down in some directory hierarchy in an archive. Compressing bigger amounts of files as efficient and fast as possible, so I want to customize a lot of parameters of the algorithm. Extracting many archives into separate or a common directory. Verifying archive integrity because something seems to be damaged. Encrypting stuff when compressing.

I like to use a good UI for that stuff when I'm on a graphical system like Windows anyway, and WinRAR is consistently better at that than 7-Zip.

I even seriously miss WinRAR when working on MacOS. Does anybody have any good suggestions for archive managers (may also be expensive ones, I don't care much if they are really good) with similar UI and functionality as WinRAR on MacOS?