Select all always appears if you have no text selected and never appears if you have some text selected. Insane UI decision by apple but that's how it is.

It's still there, it's just difficult to know when it will appear. Sometimes it takes one more tap than expected, or sometimes one must deselect a word and tap again, or change focus away and back again. Very sloppy UI.

YES. WHY?! GOD WHY!?!!?!?!?! I'M GOING INSANE!!

Sounds like the liquid glass animations are so heavy that if the system is busy with anything else for a second then everything simply breaks.

I remember seeing the videos about cpu usage spiking over 40% just to show the control center.

And similarly, even on a Mac I find myself clicking on links and button multiple times, just for things to work. It has a dedicated keyboard, how is it that they messed it up so much that a physical keyboard stops working. It's an interrupt based interface, it takes less than a millisecond to process things, how can someone mess things up so freaking stupidly.

Extremely common pitfall in UI engineering. If you treat all input as a queue that's divorced from output, you end up with situations like this.

It's kind of a paradox, but in many cases you need to actually discard touch inputs until your UI state has transitioned as a result of previous inputs. This gets extremely nuanced and it's hard to write straightforward rules about when you should and shouldn't do this. Some situations I can think of:

- Navigation: User taps a button that pushes a screen on your nav stack. You need to discard or prevent inputs while the transition animation is happening, otherwise you can push multiple copies of that screen.

- Async tasks: User taps a button that kicks off an HTTP request or similar, and you need to wait on the result before doing something else like navigation or entering some other state. Absolutely you will need to prevent inputs that would submit that request twice. You will also need some idempotency in your API design to handle failure/retries. A fun example from the 1990s is the "are you sure you want to make this POST request again" dialog that Web browsers still show by default.

- Typing: You should never discard keystrokes that insert/delete characters while a text input field is focused, but you may have to handle a state like the above if "Enter" (or whatever "done" button is displayed in the case of a software keyboard) does something like submit a form or do navigation.

Essentially we're all still riding on stuff that the original Mac OS codified in the 1980s (and some of it was stolen from Xerox, yes), so the actual interaction model of UIs is a mess of modal state that we hardly ever actually want to fully realize in code. UI is a hard problem!

Do you know a corrector that "understands" a typo at the third or fourth character?

If it's 1st or 2nd, then it's ok.

Your statement isn't incorrect - but I think it needs a slight qualification of "And none of them are acceptable". Both Apple and Android have regressed in quality and it's only possible because of a duopoly.

Is there a windows autocorrect? I thought that was a feature implemented by the individual program, not any sort of OS functionality.

I can't tell about windows - never used autocorrect there - but GBoard became laughable. I don't think I was able to use its suggestions since a few years. For instance, it will NEVER but really never put a uppercase I when I'm talking about myself. Never. I could select it from suggestions if I feel like, but I kinda gave up (this is written in Windows, that's why you see capital Is). Or my name, used quite often right, is also never spelled correctly - although it's there in the suggestions. I am using a yahoo email, GBoard knows the username, but it will ALWAYS suggest a gmail extension, which simply doesn't exist. I don't know any other keyboard which can properly handle multiple languages, so I'm stuck with GBoard, but it's nothing to be proud of.