If someone advertises their language as having no Null, no reading from uninitialized memory, and no mutation of immutable values, then I really do expect to be able to rely on those being completely absent. It is dishonest and shameful to say "No null" on the front page of the website when the developers are well aware of ways that their system fails to actually prevent null references.

If I'm buying a sandwich advertised as "no cockroaches", then I think it's appropriate to be pissed off about there being bugs in my sandwich, especially when it's clear that the sandwich shop knows all about the bugs in the sandwich and they just prefer to falsely claim their absence.

I would have no complaints if the developers would just describe these things as ambitious goals they haven't actually accomplished yet, instead of declaring that they've completed work they know they have not completed.