Earlier quoted context omitted.
It's not just that. 4e greatly simplified the rules, which made it far more accessible and playable, but it made many classes feel very much the same; every class had daily powers, encounter powers, and at-will powers. 5e managed to make every class feel unique again, and brought many of the classic D&D players back.
That's the enthusiast perspective. I think closer to the truth of the article (which is talking about broad market share among non-geeks) is the fact that 5e made D&D accessible to kids again. I've been suckered into running a weekly game for a gaggle of 10 year olds. They seem to love the game, but have absolutely zero interest in rules crunch. They're very happy having to be reminded about which die to roll and whi…
It was great and not heavily relying on maps and figurines makes it so smooth.