Working with PHPStan on level 8 is a luxury, at least for a project where you've just introduced it. To give you a practical non-open-source perspective: **we're at level 5 after 2 years of hard work**. In this level, we've noticed that PHPStan skips expression on variables that it resolved as `mixed`. Level 5 already provides valuable checks that we wanted for all **method calls and property fetches**. So [we added custom rule to report those](/blog/not-all-mixed-types-are-equally-useless). ...
