First, it was not a "sale". As widely reported, "no cash changed hands", Airbus didn't do a share swap, nothing like that. The parties really entered a joint venture, at no entry cost to Airbus. Brilliant move on their part, life support desperation on Bombardier's part.
Secondly, dishearteningly, and without any apparent redeeming value, we have shown once again that while our Canadian genius is great for inventing things, our national inferiority complex has us trapped into an endless cycle of being lousy business people. Just start the list with Nortel and Blackberry and take it wherever you want it.