On Apple devices you can hold down the new tab button in Safari for a list of recently closed tabs as well.

Edit: Shake-to-undo also works for a just closed tab.

My experience does not reflect yours. Computer Architecture, Discrete Math (logic gate math), and Operating System Concepts were all required classes in my CS degree from just a few years ago.

People aren’t okay with mediocrity. Monopolistic practices make it hard to have other choices.