As the article stated, LLVM 5.0 should really be called LLVM 5, and isn't it easier to remember and write than 17.09. And IF you do care about the patch level,

As the article stated, LLVM 5.0 should really be called LLVM 5, and isn't it easier to remember and write than 17.09. And IF you do care about the patch level, then it's LLVM 5.1 vs 17.09.1, again I'll take 5.1 any day.