Googleの結論
Think twice before using template metaprogramming or other complicated template techniques;
think about whether the average member of your team will be able to understand your code well enough
to maintain it after you switch to another project, or whether a non-C++ programmer or someone casually browsing the code base will be able to understand the error messages or trace the flow of a function they want to call.

https://google.github.io/styleguide/cppguide.html#Template_metaprogramming