We assume damage to Baltic Sea cables was sabotage, German Defence minister

Multiple cables routed via very different paths. For example, Finland also has connectivity through Sweden and Estonia. Finland could lay more cables to Sweden in the Gulf of Bothnia, there's very little reason for large Russian ships to be there.

Increased spending on "unused" capacity via slightly higher-latency links (so less commercially desirable, in normal times), so you can fall back on those if needed.

Improved seafloor cable technology, perhaps means of burying the cable for shelter, perhaps better means of repairing them in-place.

More secrecy on the exact locations of the cables? Not sure if this is realistic.

Slight bias away from sea cables, where realistic.

More research into high bandwidth microwave transmission? The islands between Finland and Sweden are close enough to each other that horizon distance might not ruin that.

SpaceX making a bunch of money, others making a lot of noise about competing constellations.

No need to sink, the Dutch Navy is taking action right now:

https://eadaily.com/en/news/2024/11/20/the-danish-navy-board...

The crack addict not complaining about the pipe blowing up after it turns out selling your family to the dealer is not a good longterm strategy.

They did the math after the recent US elections and realized the nice outcome just isn’t going to happen.