Yes, what you have said was already said in the post.

Wayland on Nouveau through the GT 710 seems to be a decent experience, so I don’t have to rely on the PC’s Integrated Graphics (forgot what it has, it’s mounted on the MOBO), allowing for a smoother and cooler functioning of the PC.
.
Now, that said:
I believe that there may have been MOBOs which support the Pentium 4 and had AGP graphics, but even if not, I want this page to be of support for any Legacy Hardware.
The GT 710 is a 2013-ish GPU, and even so it’s almost 13 years newer than anything which came out in 2000.
.
I do not believe, in my ignorance, that making custom drivers for Legacy GPU may be a once done & done solution, since by time merely passing some feature may just be missing compared to Nouveau (which I also do not know how it works; I ASSUME that it still runs on the GPU in this case of Legacy Hardware, but if not I’d like to get a source where I and anyone else can inform oneself about Nouveau’s workings).
.
.
.
I want to make one thing clear:
The computer I am working on is not and will never be used as a main computer by anyone.
I already have multiple computers for everyday use and the main one I use is also the most powerful one I have.
I may seek help for some Linux shenanigans when these PCs have problems too, but the AIO PC is mainly a collection piece, and then a “novelty item” because of my hobby.
I will also be using this AIO with both Windows 7 and Windows XP (once I find OS Images which actually work) for the sake of having such PC in my home and to see how it performs, but the use I have it for Linux and the reason I made this post are also both the same: I want to see how this stuff may work and I want to make a user-friendly page where other people can come and actually learn how this stuff works.