Hidden interface controls that affect usability

I think the article overlooks that it is not really an accident that apps and operating systems are hiding all their user interface affordances. It's an antipattern to create lock in, and it tends to occur once a piece of software has reached what they consider saturation point in terms of growth where keeping existing users in is more important than attracting new ones. It so turns out that the vast majority of software we use is created by companies in exactly that position - Google, Apple, Microsoft, Meta etc.

It might seem counter intuitive that hiding your interface stops your users leaving. But it does it because it changes your basis of assumptions about what a device is and your relationship with it. It's not something you "use", but something you "know". They want you to feel inherently linked to it at an intuitive level such that leaving their ecosystem is like losing a part of yourself. Once you've been through the experience of discovering "wow, you have to swipe up from a corner in a totally unpredictable way to do an essential task on a phone", and you build into your world of assumptions that this is how phones are, the thought of moving to a new type of phone and learning all that again is terrifying. It's no surprise at all that all the major software vendors are doing this.

It's a double edged sword though in that it can discourage users from trying their interface.

Apple's interface shits me because it's all from that one button, and I can never remember how to get to settings because I use that interface so infrequently, so Android feels more natural. Ie. Android has done it's lock-in job, but Apple has done itself a disservice.

(Not entirely fair, I also dislike Apple for all the other same old argument reasons).

Which button do you mean?