I tried that too yesterday! I wanted to try Gnome 41 so I used the gnome template in archinstall, but then afterwards I got in a big mess with NetworkManager vs. systemd-networkd and the docs said NetworkManager was included with the gnome group but then it wasn't and I wasn't sure what to disable/enable and couldn't install it until I set up wifi with systemd. Ended up installing Fedora 35 beta, so far I'm happy. The previous time I tried to install arch manually but I found out late in the process that I made a small mistake settings up something related to btrfs and luks and I didn't want to restart all over again. That part went great with archinstall.
Always tell other people you use Arch Linux.