My point is the different levels of just working are subjective, not objective. I personally have spent far more time fixing bugs or just reinstalling ubuntu systems then I have over the same period for Arch systems. So many of my ubuntu installs just ended up breaking after a while where I have had the same Arch install on systems for 5+ years now. Could never get a Ubuntu system to last more then a year.
Everyone has different stories about the different OSs. It is all subjective.
You can cherry-pick examples of problems from every OS. That is my point. They all have issues that you may or may not encounter and quite a few that would make people from other OSs scratch their head and think what the hell the devs are thinking. Pointing out one issue of one OS does not change any of that.
Which is proven by the other replys to your comment - others dont find this issue to be as show stopping as you do and just live with it or dont use it at all. How many issues do you do the same for on your favorite OS?
There is no perfect OS that just works for everyone. They are all software so they all have bugs. People how say an OS just works have never hit those bugs or have gotten used to fixing/working around or flat out ignoring them.
This is true of all OSs, including Windows, Linux and MacOS. They are all differently buggy messes.
Linux is the buggy mess that works best for me though.
There is no problem with having home on a different disk. But why do you want swap on the slower disk? These would benefit from being on the faster disks. Same with all the system binaries.
Personally I would put as much as possible on the faster disk and mount the slower somewhere that the speed matters less. Like for photos/videos in your home dir.
/boot can be anywhere though if you are getting a grub error that suggests the UEFI firmware is finding grubs first stage but grub is having issues after that. Personally I don’t use grub anymore, systemd-boot is far simpler as it does not need to deal with legacy MBR booting.