C++ started with templates as a type polymorphism mechanisms. Then it was shown to be turing complete so people started using it as such. The over time it sta

C++ started with templates as a type polymorphism mechanisms. Then it was shown to be turing complete so people started using it as such. The over time it started getting more and more things constexpr such that it's easier to execute during compile time (because it's turing complete). Jai just made the decision that everything is constexpr by default. And the answer to your question is that it's easier to do in Jai (in theory) than C++.