Thanks for that, it looks much nicer than Latex!

I'd say you're pretty lucky. Just a month and a half ago, there was a package conflict for my installed BLAS due to this. Last year there were this one, and this.

It's not such a big deal, and it depends on the software you have installed. But it's something one should know could happen.

I've installed Arch, Arcos and Manjaro (from the Arch based distros). Manjaro and Arcos are faster and easier to install and setup compared to Arch. Manjaro has nice GUI to select kernel, GPU drivers and install software (and does not automatically move you to the newest kernel, as opposed to Arch or Arcos). They had fucked up (I think 3 times) with renewing their SSL certificate, and for a short while their ISOs were unverifiable (not that big of an issue if you ask me). Since they delay their packages' updates, running them in testing for a few months for extra stability, installing from AUR is bound to break.

I've installed Manjaro on 3 computers, and worked with it extensively for about 3 years. It's a decent distro that doesn't deserve all the hate it gets.

How long have you been using it, and on how many computers?

From the Arch wiki:

Before upgrading, users are expected to visit the Arch Linux home page to check the latest news, or alternatively subscribe to the RSS feed or the arch-announce mailing list. When updates require out-of-the-ordinary user intervention (more than what can be handled simply by following the instructions given by pacman), an appropriate news post will be made.

Before upgrading fundamental software (such as the kernel, xorg, systemd, or glibc) to a new version, look over the appropriate forum to see if there have been any reported problems.

Users must equally be aware that upgrading packages can raise unexpected problems that could need immediate intervention; therefore, it is discouraged to upgrade a stable system shortly before it is required for carrying out an important task. Instead, wait to upgrade until there is enough time available to resolve any post-upgrade issues.

So unless Endeavour devs are doing anything special to make sure you can safely upgrade without checking the Arch news (and AFAIK, they don't, like most Arch based distros), you should probably check it. Of course it's a matter of chance if your system is the one that gets hit by some bug or conflict, YMMV, but eventually you'd hit a snag if you ignore Arch's devs advice.

Arch distros still require you to read the release notes before updating. It's not a hassle free affair, and those who don't do it are bound to break their system once in a while.

I'd avoid Arch or Arch based distros if you don't want to always tinker with the system to keep it running.

I think Fedora best fits your needs.

He wanted something stable.. Arch based systems require you to read the release notes each time you upgrade to make sure there's nothing special you must do. Those who are unaware of this requirement often end up with broken systems. Also I wouldn't call Arch based systems without GUI configuration tools not being too complex... Arch is for those who like to tinker, edit lots of config text files and read man pages and wiki entries.

Personally, I like Arch Arcos and even Manjaro (Probably EOS as well, but it doesn't play well with Ventoy) - but I wouldn't recommend it to someone who just wants things to work out of the box with minimal tinkering and not require special attention when updating.