Europe, yes. Britain, doubtful.

For full functionality sure. For basic functionality no. Searching on Google is basic functionality I’d say.

No. In Germany the big companies all have unions. You can always try to negotiate for better conditions, but it always has to be at least the union Tarif. If you can show that you are worth more you can get it.

crash from undocumented function parameter invariants

My favourite, as that was the exact point the dev was making in his talk, that the stuff is badly documented and that the function signature would document it perfectly.