Definitely not. Azure doesn't charge for intra region costs FWIW.

Getting terabits and terabits of 'private' interconnect is unbelievably cheap at amazon scale. AWS even own some of their own cables and have plans to build more.

There is _so_ much capacity available on fiber links. For example one newish (Anjana) cable between the US and Europe has 480Tbit/sec capacity. That's just one cable. And that could probably be upgraded to 10-20x that already with newer modulation techniques.