The style guide should discourage the use of non-local variables with static storage duration and non-trivial constructors or destructors. These are well known sources of various problems such as "initialization order fiascos".
https://en.cppreference.com/w/cpp/language/siof

The style guide should also discourage the use of non-local variables with static storage duration and non-constexpr initializers. It already discourages such for non-local variables with thread-local storage duration - JDK-8283469, JDK-8282721.