Honestly, I'm not against it, a blue whale is a remarkable creature and still alive today, unlike Dippy, and it's not as if Dippy has been at the front since the museums creation, it's only been a little over thirty years.
Plus, Dippy is going on a national tour which will hopefully bring more traffic to the museum which contains a myraid of other dinosaur skeletons and artifacts. So while it'll be a shame not to see Dippy in the front lobby the next time I go there, it's not the end of the world...that already happened for Dippy.
