Interesting question. I have an OML (legacy of cancer 3 years ago) which I am now trying to get removed. It’s not been an issue at my current operator as we have lots of young pilots and few other OMLs. However at smaller bases etc it could be an issue with aging pilots and other OMLs. A base with 10 pilots of which 5 >60 or OML starts to get challenging and can affect flexibility.
I think that’s the benefit of being FW with an OML you’re probably among hundreds of other pilots and it’s easy to roster you accordingly, but the rotary world is a lot smaller and you are more ‘difficult’ to assimilate. Hence why I’m trying to remove mine….