Huh, it took a while for the wiki to be updated to reflect that. The official announcement was on april 1st, 2021 (the date was almost certainly a joke of how unexpected it was to people now following its development, but the release was no joke): https://archlinux.org/news/installation-medium-with-installe...

Welp, looks like I'm switching back from Manjaro for my next Linux install.

I recently adopted Arch onto my laptop and didn't even realize 'archinstall' wasn't always a thing. I looked up a traditional Arch installation and think I might have skipped it had the installer not been present when I was distro hopping.

Yes, it does a quite decent job of getting you up and running with a bootloader and disk encryption all configured. From there, you can just bootstrap the rest. But that was the main reason for me to pick Manjaro half a year ago.