Okay, this is a succsessfull "educated guess" whats working. Thanks for sharing your results and experience. We all need more of this.
But this is the part with "trial and error" or "buy something and test it".
Reading the changelogs and update infos shows no evolutional leaps to eCs 2.2.
(like "hey! we have rewritten and ported the memory managment to be able to adress flat 45 bit!", which would be a leap, that puts ArcaOS years ahead of Linux or windows

)
So my "educated guess" is: what works under ecs 2.2, that works under ArcaOs?
That leads me to three long-known possible pitfalls:
*UEFI (how to decipher the advertisment BS in the docs of todays mainboards to decide, if this mainboard has enough legacy support or just a crippled "my mouse works in UEFI-GUI too!"),
*USB and storage driver support (e.g.: are Lars' USB-drivers now USB3-aware or has the board at least USB2-Ports?).
This is a point, I haven'd reread yet. ->Notice to me: read the funny manual!
*Graphics support: Does panorama or SNAP supports an actual graphics card in_wide_mode? My last test with intel CPU-integrated graphics was a desaster, so i do not expect this to work.
I know, the usual answer could be something like this: "Order at Amazon and send it back, if its not working." but hey! its not fair.
I'm sure, ArcaNoae have installed ArcaOs at least on some machines. Maybe they can tell us about it?
I remember Eugenes supported HW list on ecomstaion.ru. I also remember Martins start of a hardware-wiki here. But both are not broad enough to be a HW buyers guide.