No one seems to mention license considerations when talking about static linking. Even if your app is open source, your particular license may not be legally compatible with the GPL, for example. 3BSD, MIT, and Apache most likely don’t change in a single binary but it’s kind of a new thing that no one was really thinking of before when mixing licenses together.
I think this default okay assumption comes from most developers having a cloud-centric view where there’s technically no “distribution” to trigger copyright.