Do you explain why, to those who don’t make it to the next round? I did one of these, and the response I got was essentially “You didn’t make it”, i.e I had no idea of what was wrong with my code or why I didn’t make it through.
Yeah we do, but it's usually just a sentence or two, something like "we wanted to see a deeper use of language features" or "we're looking for a deeper understanding of framework x". We used to write more, but too many people would try to argue.