I was expecting to fly on the Dublin-Tours flight on the same day as the OP. I think by most people's perspective the situation was within Ryanair's control but I expect Ryanair will deny any EU261 comp claim by stating the situation was outside their control. I'll still probably file a claim as a way to not give up rights, and in case a gov't or class-action-like situation provokes them to pay claims. I'm just not sure the info for a US bank acct will conform to their expectations/requirements for where to deposit funds.