I don't know if I misread your post or you edited it afterwards. When I originally read it I have seen punctuation that made your post imply that legacy browser support SHOULD be taught and that rookies SHOULD be indoctrinated in legacy support.
I apologize for misreading your post.
p.s.: If you had to support IE6 - then you are a graybeard :D. Even if you are a 25 year old graybeard.
I was not trying to be grizzled when I responded, just realistic. Doing IE6 support is still a pretty fresh memory for me. It's just realistic.