> ANY desire to join NATO
Sweden has been using Nato standards and running occasional exercises with Nato for a while now. They didn’t want to be officially part of it because of their unique perspective on War and Peace (see Olof Palme, sending Blue helmets in Cyprus), but there wasn’t a lack of desire to join. I’d compare it to Switzerland and the EU: the de-facto alliance is obviously beneficial, but principles have kept things separated on paper.
Finland, that’s more complicated: unlike Baltic countries and the Kaliningrad exclave, they were not in the Soviet Union. That meant a lot of pressure to remain neutral, translated until last year into “Finlandization”: a refusal to take either side. That pressure ended with the Fall of the Berlin Wall, but Finland (like Sweden) saw no reason to change their official neutral position.
When Russia started to mess with Estonia, the need to ally with Nato, in particular on cyber-defense questions, became a lot more present for everyone nearby. I suspect that Finland wanted to be ready, adopt Nato standards, training, methods, etc., and pick the right moment to join officially. Like the Baltic trio, the Russian presence looms high in the East, and I’d be surprised if there were not regular overtures and unofficial promises of support. The USA and Canada care a lot about the Arctic, and it’s not hard to count the allies there.
So, I don’t think it was a major shift—like Italy changing sides at the end of WW2. It’s more a gradual rapprochement, matching Putin’s increasingly concerning policies, that hit a very good reason to accelerate. The process has been mostly political and official. Neither Sweden nor Finland had to change guns, tactics, or radio signals.