Used archinstall too 3 years ago, btw. The result is still running with no noticeable performance degradation if not rather performance improvements. Games continue to get snappier and look better, I find.
Also it's stable af. Can coun't on one hand where I had to intervene on OS updates. On those only one case where I had a terminal after reboot. All were resolved within an hour or so. Driver updates for nvidia just run through. The only time I had to mess with them was when Valve rolled out Steam's new UI. That's when I learned about Arch's downgrade mechanism.
Did 2 manual i3 installs with BIOS boot mode and GRUB before I started using archinstall. I would bitterly fail with manually installing ESP/GPT/UEFI, Dual- and SystemD-boot, KDE, BTRFS, PipeWire. Used archinstall on a few PCs now and had 1 out of 4 where it wouldn't install. On the 1 archinstall-fail an EndeavourOS Jellyfin/Emulationstation is alive and rocking now.
Ubuntu, Mint or Fedora might be better for beginners than Arch-based but a colleague without prior linux knowledge installed it himself for work and seems to have no problems. The welcome dialogue with update-starter and notifier, package cleaner, arch news reader, nvidia-installer, logviewer, mirror ranking, and links to relevant topics is good stuff. IMO they should pre-install Octopi or Pamac instead of their rudimentary graphical package manager. Endeavour is as stable as Arch so far.
Edit: exchanged PulseAudio with PipeWire which is even better ofc