I think that whoever started the myth that holes on irons for waxing are bad just wanted to sell more waxing irons. The holes have never caused any smoking for me at least, and really, they are a non-issue IMO.
Same here I've never had any issues with the holes collecting wax or anything. I'm a budget boarder, I'll stick with my cheapo walmart iron.
13 K2 Turbo Dream 160W w/Flow NXT-FX
11 K2 Turbo Dream 160W w/Flow NXT-FS
OLD K2 Fatbob 154W w/Flow Trilogy