> Actually it's worse than that they used to have a TUI installer but then removed it
Not sure what you're referring to here. Archinstall [1] is relatively recent [2]. I used it a few weeks ago to quickly yeet a machine into Arch for some testing. Worked flawlessly and had the machine from live boot -> Arch install on root media in under 5 minutes.
I remember using TUI for Arch installation 10+ years ago. I think it also was named archinstall iso back then. But it had some limitations. I do prefer the way it is right now though, it seems rather simple.