But honestly, after seeing the error messages of Clang compared to those of GCC, I have zero intention of going back to GCC.
It may be that GCC generates better code (to be honest, I don't know) but 99% of the time that I'm using a compiler, I'm interacting with the error messages. The quality of the error messages has a real, significant impact in my development time. And if I want better code, I can always use GCC for the final compilation after doing all the debugging work with Clang.
As I said, I can't say I hate GCC, it's a free product and many, many wonderful projects have been compiled with it. But I honestly don't understand why, after all these years of development, the error messages are still that bad.