So I’ve been looking at upgrading my PC and it looks like I can get a better “micro” pc than my current (ancient) desktop for significantly less money than a full blown gaming rig. An example of such a rig is this.
I don’t have high gaming requirements - I play mostly old games, I think the newest games I play are from 5+ years ago.
What reasons are there for not buying one of these (over a comparable “proper” desktop)?
The machine you linked should be fine for light gaming. But for not much more money you could get a full blown gaming PC. That will be a lot more powerful and you can upgrade it. If convenience is your main priority, go with the mini PC.