Boeing never owned Canadair - that was DeHavilland, Toronto. Bombardier bought DeH from Boeing.
OK, faulty memory - the point is still that Boeing had recent, detailed, and very unpleasant experience with a major part of what is now Bombardier Aerospace.
BTW when I worked at the Lazy B back in the 70s, they were reported as receiving 12.5% of all the costs of running their Seattle area plants from the USAF just to keep the facility running in case it was needed for War Production.
Urban legend - there
might have been something to that in the 1950s (the story is fuzzy), it's not been true for at least 50 years.