I asked my c++ professor last semester about using cmake and he did not know what cmake was

Is this unusual? Should I avoid his class next semester? There have been quite a few things I have asked him questions about that he has asked me to explain to him what I was even asking about, including cmake and <ranges>. When I asked him about vectors he said to just not use them. It seemed like he had just barely graduated UCB undergrad and was still learning things himself.

https://redd.it/1u15vih
@r_cpp