PHP vs RoR - 2 Years Later

I have never been convinced that there were compelling reasons to use any specific language over another. Specifically Ruby on Rails over PHP. RoR provides many great advantages relative to data-basing and prototyping that make it attractive to those looking to increase productivity. Would not becoming an expert in any language increase productivity? For the most part I believe that programmers should code in the language that they enjoy. This by default helps them become experts. My belief has always been predicated on the theory that the grass is not always greener on the other side. Your customers...