Huge number of them are obscure or in the standard library. A C programmer with some experience can go through a list and ignore the C library ones, cross out t

Huge number of them are obscure or in the standard library. A C programmer with some experience can go through a list and ignore the C library ones, cross out the weird ones that he'd never hit anyway because he'd not even think of writing code that way, and end up with some useful compressed list of maybe 30 for day to day use that really need to be observed because they normally appear in regular code. As for the standard library, that is often irrelevant, depending on what kind of code you're writing. Bootloader or Linux kernel, some other microcontroller code? Probably not relevant. GNOME C app? Not very relevant either, because it's all wrapped by glib, etc. And even when it's relevant, docs are very quickly searchable (by function name) and pitfalls are documented there.