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)?


Size gives you options. How many expansion cards. How many nvme or ssd’s do you want to connect. How many USB ports. I think micro atx is a good compromise on size. Not huge, and not tiny.
Packing powerful components in a tiny case is just asking for them to get thermally throttled and avoid you getting most out of your purchase.