Yes, runtimes and libraries can have bugs, too, agreed, but at least you will have to just recompile with the patched version vs having to fix and test your cod

Yes, runtimes and libraries can have bugs, too, agreed, but at least you will have to just recompile with the patched version vs having to fix and test your code as fast as possible. It's more efficient as well as fixing the core will benefit many (well, of course, that would have compromised many as well... to start with).