And I hate when people take a single case and extrapolate it as a general statement.
By that argument Ubuntu is equally unstable as they have rolled out updates that broke grub resulting in unbootable systems - not during a full distro upgrade, but as Ubuntu specific patches to LTS.
In the end, we have choice, and choice is a good thing.
Arch is not harder to maintain nor is it easier to break, that's a myth. If anything, it's the opposite, as a rolling release stays up to date, though it relies on the user keeping it up to date. If you get lazy with updates, then yes, you are going to have problems eventually.
This is normal behavior. There is much more to the JVMs memory usage beyond what's allocated to the heap - there are other memory regions as well. There are additional tuning options for them, but it's a complicated subject and if you aren't actually encountering out of memory issues you have to ask if this is worth the effort to tune it.
Actually native encryption has been a feature of ZFS for a few years now. It's nice not having to have an extra LUKS layer.
XFS does not do snapshots, replicas, and all the other myriad of things that ZFS does.
ZFS for nearly everything plus ZFSBootMenu EFI on root data pools. Get a bad upgrade? No problem, boot a previous snapshot (auto created with a pacman hook), which I had to do recently when 6.6.39 LTS kernel had a bug. Snapshots are also great when doing things such as upgrading postgres, hass, Plex, etc.
Don't know why you are being voted down, you are 100% correct. RTLAAU.
Nope, it doesn't work that way. You have to umount it. You could reboot after removing it from fstab, but that's a bigger hammer than necessary.
You need to move the service file to the right directory, for starters.
Nope, they should not be executable.
I use syncthing all over the place for this sort of thing. I have some sync directories that are multi way synced across multiple devices, others that are one-way drop targets to a specific device, others that are for operations like backing up photos. It's quite excellent with a good sync algorithm that rarely results in conflicts.
I use it everywhere, raidz2 on HDDs for a NAS also with mirrored NVMe root pool, and on a couple of laptops. zfsbootmenu is awesome, so I can boot into any snapshot, and a pacman hook that creates a snapshot whenever I upgrade packages. Even if it's overkill for some of my use, I use it anyway and trust it much more than anything else - it has a proven track record. Backups to rsync.net are a breeze with borg/borgmatic.