Lazy bones? I don't care if you are Felix, no amount of blowing compressed air is going to keep up with the dust bunnies. I know, because I have a Lian Li Lancool II case for the last 4.5 years and I'm done with it. The only way I can really clean it, is to completely take it all apart. That dust sticks to parts like moon dust, the only way to get rid of it is a good rubbing with a cloth.
I had a case a long time back that had filters and after 5 years had very little buildup on the parts, very easy to keep clean. But like all things, it is very outdated, like hot swap ports for hard drives. I liked the Lian Li when I bought it, but now I really want the filters back.