Just checked in for a RIX-HEL flight. Today is one of the strike days. At this point my flight is not cancelled, so hopefully all good.
Conversation at check-in went something like this:
Agent:" The specific flight you're booked on has been cancelled quite a lot recently, especially on strike days. So you might be in for a long wait in the lounge."
Me: "Oh, if that's the case, can I take the earlier flight instead? I see there's one going in an hour that has empty seats."
Agent: "No, you can't because you're on a Superlight fare."
Me: "But you just told me my flight was at high risk of getting cancelled. It doesn't make sense not to send me on an earlier flight if that one is definitely running and has empty seats."
Agent: "Yes."
Me: "But you can't rebook me onto that flight?"
Agent: "No I cannot."
On other strike days I've had better luck with getting rebooked even when my flight wasn't officially cancelled yet, but that's been at HEL and not at an outstation.