I am almost two years in on my Mac Studio, and yes, I have had it sitting on a Spigen stand the last year.
The Mac Studio is located on a desk in my office in the basement. Basement is unfinished, with concrete floors and walls and I only vacuum about once a fortnight. The office is a busy one with a Mac Studio, 2 Mac Pros, laptops, monitors, TB docking stations, NASes, printer, switch, and a collection of external SSDs and HDDs, and lots of traffic… We have a dog, and he leaves his “imprint” on the environment as well.
I clean the Spigen filter about once a quarter and only ever see a bit of dust accumulation, and when I vacuum the Mac Studio, very little dust seems to be inside the unit.
Maybe not the popular opinion, but perhaps we are over-thinking this a bit, and I wonder how susceptible the Mac Studio actually is to dust accumulation?