I had to laugh at the recent announcement of a successful Ariane rocket launch. I can’t remember the last time I read about an Ariane rocket launch.
Ariane rocket launch, billions and billions $$$$ for each launch.
Not reusable
Therefore, to use the wacky woke vernacular, it is not sustainable.
Every time Elon Musk and SpaceX launch/test, Robert Heinlein is smiling down from Heaven. .
Musk derided the Ariane 5 as a joke I think it was. Ariane 6 was in development, but years late. And once it got made, it still wasn’t reusable. And the launch cost to the customer covers the staff, fuel, and throwaway rocket, but probably only just. The next Ariane is supposed to address reusability in some fashion, but probably won’t be in testing for ten years.