Which Apple apps are paid for? Their entire productivity suite is free, Office 365 is a hefty enough price. You get a free photo editing app, free video editing app and free music production app on every device. Of course there’s a couple of Pro apps for music and video but they are literally for pro users and generally the investment is worth what you can do with them.

That’s true, and I believe it was to lure people from using Windows computer / make the switch. I almost forgot that they charged it at some point though, it brings back memories!

Paying for upgrades was popularised by apps on Apple devices. I remember a time when upgrades were free for life.