Depends on what it’s unwilling to break. “The compiler generates code that segfaults when you multiply 13 * 37, but someone found a way way to trap it and used that as a faster way to make syscalls on Prime minicomputer, so we had to add -ffix-four-eight-won, which the original implementor misspelled in 1993 so we can’t fix that, either, for backward compatibility.”

Some of its actual weirdnesses seem no less odd than that to people who aren’t C experts, I assure you.