That's not true at all. Many many people save everything they touch to Desktop, so it builds up cruft over time. There are ancient jokes about it. And computer

That's not true at all. Many many people save everything they touch to Desktop, so it builds up cruft over time. There are ancient jokes about it. And computers were slower then brute-forcing big-O complexity was less feasible. And the "barrier to entry" gets lower as an org gross and needs to higher thousands of people and get less picky. I'm sure that MS doesn't require people to ace the hard leetcode problem to get an offer. It's just there to provide a broad picture of algorithm memory and coding speed (which is a stupid metric, not a "high" metric).