you can believe what you want and be paranoid, that's your prerogative but what qualifications do you have? my field is electronics assembly and repair, also I repair computers as a side job and I have taken apart over hundreds of laptops to repair and diagnose faulty components and do up grades and you know what I've seen with all those laptops? not 1 laptop had dust accumulation EVER... yes some laptops had the vents clogged with animal hair and even lint from people using their laptops on the bed... but never dust.. and laptops have MORE bigger vents than the SP3... just saying
Now you're just being argumentative. Dust? Lint? Dog hair? Fine, by "dust" I meant to include any and all of the above. And I'm not being paranoid. I'm not worried. I was merely asking a simple question.
As for qualifications - 18-years in IT and longer than that building, upgrading, repairing computers/laptops for myself, family and friends. Smokers were always the worst. You could guarantee that their computer was going to be coated inside with dust, when you cracked it open.
If you've ever replaced the cooling fan/heat sink on a laptop more than a couple of years old, you can't say you didn't find any dust in it, smoker or otherwise. Replacing the RAM or NIC module won't expose it, but crack open the air cooling loop, and it's there. I dare say that every heat sink I've ever pulled out of a computer had dust in the fins, and there has been no smoking in my house for nearly 20-years. I'm looking at my PC right now, and the front *dust filter* is in sore need of cleaning. No dog hair, just dust. If not for that filter, that dust would have been circulated through the PC.
The SP3 is an engineering marvel. It makes maximum use of the tiny areas of empty space available for circulating air. It wouldn't take nearly as much accumulation as a laptop, before cooling efficiency could be compromised. I would simply like to keep it as clean inside as possible. Maybe it won't be a problem at all. That would be great.