It is nothing but semantics depending on who says goodby to who. What should happen, but probably won't for some time, is that France, Spain, Italy, Portugal and Greece should say goodby to Germany. This really wouldn't be forcing Germany to do anything in particular, but it is the near equivalent of forcing them out of the EMU. I believe that if the PIGS and France were to insist that if Germany does not drop their opposition to the eurobond they will all exit together and form a new monetary union with both a common currency and a common bond, that under that kind of pressure Germany would agree to the eurobond. Unless Germany agrees to a common bond, it is a virtual certainty that eventually the PIGS will leave the EMU, and quite likely France will go with them. This would not necessarily mean however that these countries would leave the EU, just the EMU.
What would result is a Germany left in the EMU together with the fledgling States that are not yet full members. That would leave Germany in a somewhat precarious position and they would obviously do something about that, but what?
I am happy to go on record as saying that the present EMU can not last much longer without a common bond. No more than a decade I would think. The PIGS will eventually tire of permanent recession and having to grovel for more high interest, German Care Packages.
The pressure is going to continue to build in favor of a common bond.