Well this admittedly cool looking stunt represents more than 5 persons worth of annual sustainable co2 budget (estimated at 3T/year), so I‘d say it’s a smidgeon above the „bare minimum for sustaining life”.
That's why you don't do stuff like this for each and every subvariant. This is a once in half a century occasion, it absolutely pales in comparison to the amount of fuel the type has burned for trade show visits, photo opportunities and numerous other nonessentials. Arguably there isn't a single use case for jet aviation that isn't far out of the range of sustainable co2 budget.
