Integrating Real-Time Online Traffic w/ ATC: ouch!

I was getting ready to launch a 9h49m flight from Mexico City MMMX to Rio de Janeiro SBGL and marveled at the choreography involved and what a potential challenge to make work w/ RT Online Traffic.  If MSFS is using FlightAware (I read they are), if I use FlightAware it does not track position during taxi but does indicate when taxi commences and when takeoff happens and some intermediate spots I think as well.  So they have to figure out how to coordinate all of this while at the same time accommodate actual traffic AND have it more or less jive w/ ATC to make matters worse!  I mean look at this congestion which did get stuck for a minute or so before everyone got lined up to move in coordinated fashion as seen in the second image--a little MC Escher!   Perhaps the 3rd party products have nailed this issue, the coordination w/ real time real traffic, and if so that's great it means it can be done.  It was a blast taking off w/ a full PAX load and fuel and felt like a B16 Bomber fully loaded and trying to get air born!  MMMX is the place to do that though 🐵