I don't quite agree with your opinion. Sure, Nolan's movies aren't quite as profitable as blockbuster blockbuster brands, but it's still a name that attracts many, casual viewers. As for "Interstellar," it grossed over $ 300 million for the studio (not counting streaming, DVD sales etc.) + was a long-talked about successful film, further enhancing WarnerBros's reputation. The case of "Tenet" is special because of the pandemic - so far no film has made money in this exceptional time.

I can certainly agree that he will not be given such freedom to create. But I see another reason for this - film studios won't want to take any chances, so they'll be carefully calculating every dollar and controlling Nolan's work more.

I will 100% agree on Universal, in recent years they have been doing a very good job of what you wrote.