For decades the cruise industry has treated Europe like a seasonal fling. Everyone rushes in around April, clogs the Mediterranean through summer, then vanishes to the Caribbean the minute temperatures dip below 70 degrees. By November, many European ports feel abandoned except for the occasional river cruise and a few hardy luxury lines repositioning ships. Explora Journeys is doing something different. Europe is now year round! The luxury lifestyle cruise brand from the MSC Group has decided Europe isn’t just a summer destination anymore. Explora will now keep ships sailing Europe year-round, including during the traditionally “dead” cruise season from December through March. Honestly? It’s about time. But really, this is more an outcome of Trump’s attacks on Iran and the ships now avoiding the Red Sea and Arabian Peninsula. Most cruise lines have trained travelers to think Europe only works in peak summer. Yet some of the best trips I’ve ever taken in Europe happened in the off-season. Fewer tourists.…