Redundant wchar_t instantiations [question]

[Noxybot]

Opening this issue to get answers on the questions asked in this closed PR: https://github.com/fmtlib/fmt/pull/4126.

The bottom line: why is the situation with wchar_t instantiations is not consistent? Is there some tradeoff happening here? (Like it's OK to have some wchar_t instantiations for those specific functions link, but not for others?)