I guess it depends on what you're used to. Each time I switch from C to C++, compile times take some adjusting.

If you're not careful about how you organise your C++ code (be careful what you put in headers, don't go crazy with templates), compiling can get really slow, even for relatively small projects.

Just #include <iostream> and the compiler needs to process 37,799(!) lines and more than a MB of data:

  echo '#include <iostream>' | g++ -E  -x c++ - | wc
     37799  104779 1280834

To contrast in C:

  echo '#include <stdio.h>' | gcc -E  -x c - | wc
       456    1638   20880

Comparing the compile times of PostgreSQL (C, minutes on an old laptop) and MySQL (C++, 30+ minutes) is also instructive.

Maybe when modules are finally introduced, things will improve.