Looking at the OP's other post on FT the plan seems to be to go backpacking around Europe for an extended period.

I know backpackers like to travel light, but I can't somehow see someone going on an extended trip with less than 10 kg of baggage (Ryanair's carry-on limit) so there would almost definitely be a checked bag fee in addition to all the other add-on fees. And aren't checked bag fees and check-in fees due to go up again in the near future?

SAS is more and more starting to look like the better option!