I've had a pleasant experience with rail-on-ferry when I traveled to Sicily. It probably wouldn't work for Finland, however, as their train gauge is 1522mm rather than the common 1435mm.

Rail-to-ferry should work, however. Stockholm has very pleasant ferries to Turku and some that take a little longer to Helsinki. Both should help connect Finland.

That sounds like a great idea for most EU countries.

For countries like Malta, Cyprus, Ireland and Finland, that might become very expensive.

Please tell me that there's a Lemmy community out there for EU memes.

Why is that? That shouldn't be necessary, should it?