I have throughout my career, carried the fuel I wish to carry, "within reason". The Captain has and always will have, the discretion to carry more fuel should he/she so wish I believe.
I will continue to carry extra fuel if I consider it prudent to do so. The company I work for is aware of this. If they are not happy with that, they of course will replace me.So far I still have employment but I have not however had an expensive diversion over fuel issues, for e.g., for many, many years.
Fortunately I am in a branch of aviation where I am not treated like a complete robot, therefore allowed to think for myself once in a while.