Nobody is asking you to defect.
But there are things non-Sony bodies can do better in comparison occasionally and that should not be dismissed!

I loved my a700 for everything except the local availability and prices of good used Minolta glass and third party glass.
High ISO did not bother me much since I learned to live with it or use remote flashes.
Build was amazing and the VG was awesome.

Would I ditch my 7D and go back? Hell no. I'm liking my High ISO and the used market is filled with every good glass I want.