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This is awesome. I don't have a dog in the GCC-vs-Clang hunt, but I love love love that the two are leapfrogging each other. It would suck if, say, Clang were so much better than GCC that they stopped doing cool work on it (and vice versa). Everyone benefits from this particular friendly competition!

Great job, both teams. Please keep up the great work!

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FWIW, I doubt the GNU project would stop working on GCC, even if it were rarely used. GNU Hurd and similar rarely used projects barrel on under the GNU banner.

The work wouldn't stop, but people would continue to do the same things they know how to do. Friendly competition gives new ideas. Clang basically forced nicer error messages on GCC. Sanitizers started with clang and were ported to GCC.

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