We've had a lot of budgies in our life.
The discussion went on for 50 years. Cage or not.
The funniest couple we've had was one tame and one wild together.
The wild probably thought the tame was a little stupid.
Non of them picked up the habits from each other. They flew together and mixed fine. If you wanted a little chat with the tame it usually appreciated it. But the wild never allowed it
So many years when we had to take away our last tame budgie.
If you wonder how. We kept them apart in the beginning.