You shouldn't be downvoted for this. I was missing new apple features for years, until I started browsing the apple subreddit. There are a lot of hidden features.

Seems there is a good manual online, but it's poorly advertised. The new features are often mainly announced once when you first open a system app after an ios update.

I've seem my parents repeatedly close them in a rush to get to the app. There's no "show me these tips later" option either, so they never learn the new features.

There are many advantages to the simplicity, but it's not wrong to say that new stuff is poorly discoverable. For pros and casual users alike.

That said, basic useability is great. Both of my parents figured out how to use iphones for their day to day with basically no tech support requests. Same with a mac. I was impressed, they always asked for help on Windows.