I would like to know what projects cannot be done in C.
I know programming can be quicker and more intuitive in other languages. But I would like to know what features are missing in C that would prevent a project from being completed well.
For example, very few web-frameworks exist in C.
C, like many other languages, is Turing Complete.
So simple answer is: none.
However, C++ Template Meta Programming meets the same criterion, so ‘it is possible’ is not a good criterion to choose tools.