Not OP, but own a similarly open-air PC (Thermaltake Core P3).

I bought a Wolfbox MF200 duster on sale off their AliExpress store for ~$50USD; just need to just give it a quick blast every once in a while and it all remains dust free.

Honestly dust management in open frames is significantly less hassle than in closed cases - regardless of positive/negative internal pressure.

Wait, wasn’t this the same update Microsoft just yesterday said was a “predictable and low-impact” one?

The peak-years Simpsons writer’s room couldn’t come up with a better punchline.