Real talk, I think Flair's farewell segment in its entirety is probably the very best thing I've ever seen on a wrestling program.
And yeah of course he tarnished it when he continued to wrestle, and he's taken countless L's over the years, but I don't find it too hard to separate his WWE career from his TNA career. I look at them as two separate entities and I still see that farewell segment as his REAL goodbye to wrestling. It's still powerful television whenever I watch it. His emotional attachment was to WWE, so it was a genuine goodbye.
TNA was just business to him, although he still managed to be entertaining there.
On a related note, the major sports can only dream of matching WWE when it comes to honoring their legends.