I will rejoin the conversation/argument with this. My workshop used to be a real mess, dust everywhere and on every surface. Now I am not just talking of a light dusting but half an inch or more thick. And then I started losing things, chuck keys, pencils and even parts of projects that I had made. I have been working on a budget most of my life (and before everyone starts on about the cost of a set of lungs if you can't afford it you just can't buy it!!) My extractor system was leaving the door open with a floor mounted fan drawing the dust out.
These days I have a proper extractor, my workshop is cleaner (mostly) and certainly a lot safer and I no longer lose small items in the dust (well not so many anyway)It is certainly a more pleasant place to work in. But I still use compressed air and quite honestly some jobs are not doable without it.