The `fmt::format` can process the format string at compile time. Currently, we don't seem to be using that as we don't use `FMT_STRING`. Starting with C++20, that will be the default though, and one has to explicitly opt out in places where the string is not known at compile time using `fmt::runtime(...)`. Currently, our code does not compile as C++20 because of that. Unfortunately, we have many places with runtime format strings, because of i18n. Pull Request: https://projects.blender.org/blender/blender/pulls/130392