All linux versions are outdated, they all feel like a 70's OS compared to any AmigaOS flavour
Frankly, while there are still lots of things I love with AmigaOS and miss in Linux, this is a downright ridiculous statement to make. It takes a *huge* amount of tweaks to AmigaOS to get a system that is anywhere near as usable as most modern Linux distro's, and you'll still have huge holes.
Already in '89 or so while using AmigaOS extensively, my system was tweaked beyond recognition to get to the experience I enjoyed, and it was still in most ways substantially inferior to most modern Linux distros.
Invest the same effort in tweaking a Linux distribution now, and you end up with something vastly more polished. And if you like you could end up with something substantially closer to an Amiga experience.
Sure, there are still things modern mainstream OS's lack, or are just "reinventing" now (the parallel between workspaces and increasing use of fullscreen apps to screens for example, is quite amusing and satisfying; and Ubuntu's switch to a global menu bar likewise), but the pale in comparison to the features that are lacking, such as proper memory protection and full support for virtualization (I have a dozen or so lightweight virtual machines running on my home machine) or full fledged package management.
I'd love to be able to use a more Amiga-ish OS as my main OS, but before that can happen, either AROS or AmigaOS would need to take a lot *more* stuff from Unix/Linux, or more Amiga-like features would need to be ported to Linux; there's no way I'd be able to go give up all the things I've come to expect in an OS after using Linux.
(I say *more* stuff would need to be taken from Unix/Linux, because already with the first handful of Fish disks in the 80's we were getting a steady stream of Unix ports)