They generally don't like other projects, they also compare the security to the "Android Open Source Project" as if it's a real thing, AOSP doesn't run on a single phone on earth and as such isn't an option for anybody.

And for the updates I could comment that

> Fairphone 6 with stock OS has very lacking security due to delayed patches (1-2 months for partial backports, much longer for full Android patches)

Is certainly much better than my Samsung flagship