It will support older device, but people may (depending on hardware support) have issue with very old device (more than 10 - 15 years old).
I often see people complain about computer X or Y, but when we check there is 0 chance they actually use the device they complain about as it would be (even for linux) so slow that it would be nearly unusable (especially true with the massive amount of RAM needed for basic website these day).
Of Course they have a financial Interest. Canonical is a Company - and as a Company they have financial Interests.
Well, the Question is: when Xorg is out in fedora, Gnome and Ubuntu, how far will be the Wayland Development and Implementation? When this at the Point works, it would be okay. If not, then it would be a Problem.
In a more up-to-date Gnome Version, You have a better Wayland Implementation than here on Zorin 17 with Gnome 43. That counts for Plasma, too. So, it depends (partly) from what System and Desktop You use, how well Hardware is supported.
the only thing who let me live in peace is that linux is not windows and i can stay with older distro without big risk...
When these older Distros still get Support with Updates, yes.
I've recently found differences with Wayland/Xorg and Zorin v Fedora (which may also relate to Wayland versions). I didn't use to care, but I'm beginning to...
Fractional scaling in Zorin 17 Wayland results in some apps being blurry, while this isn't the case in Zorin Xorg or Fedora 42.
I'm hoping Zorin 18 (Wayland specifically) improves this 