"Vested interest" doesn't have to be financial. They are not going to take away his Nobel price if it turns out that the expansion of the Universe is not accele

"Vested interest" doesn't have to be financial. They are not going to take away his Nobel price if it turns out that the expansion of the Universe is not accelerating, but nobody wants to spend the rest of their life saying "I got a Nobel price for X, but it turns out X was wrong." That's some pretty heavy psychological "vested interest", I think.