I honestly don't understand people who get so attached to an actor playing a character that they refuse to let them go even to the character's potential detriment (see also: Heath Ledger's Joker, Chadwick Boseman's T'Challa, etc.).
Look, I love Hugh Jackman's Wolverine. But the man is already 55. While he is in great shape, it just isn't realistic to expect him to be Wolverine again for the next 10-15+ years. I am 100% ready for someone else's take on the character. Change is good sometimes, guys.
I think fanboys are their own worst enemies a lot of the time and don't think long-term. Some people, for example, are already trying to say that Channing Tatum should be the MCU Gambit based on one, like, 10-minute comedic performance of the character. This is despite the fact that he will likely be at least 50 by the time an X-Men movie rolls around. Just absurd.