Interesting, as a German (which also has a similar system), I am the complete opposite, I find it super irritating when people address me by my last name. And the worst part is having to figure out how to address others, especially people you've known for a while but aren't really close to, e.g. say long-time neighbors I rarely meet.
Luckily, in the IT industry, it's common to just use first names with everybody.
Luckily, in the IT industry, it's common to just use first names with everybody.