[DagAgren]

You can't really assume a strong password, because if you have to type in 12 characters, letters and punctuation marks every time you want to look at your phone, you're going to give up on the whole thing pretty quickly.

To be usable, phones need to allow relatively weak passwords.

[Thorrez]

I've had a password like that on my (Android) phone for ~7 years and haven't given up. I don't use punctuation though, it's not worth the extra taps to get to the punctuation keyboard for the entropy you gain. I've never had fingerprint or face ID enabled either.

12 characters gives 62 bits of entropy. That's plenty if proper key strengthening is in place.

Linus Sebastian says that when his phone got slower to open up, he got happier, because it caused him to use his phone less, cutting out the useless stuff. https://youtu.be/WGZh-xP-q7A?t=305