I'm all for visits to major cities in Europe in winter. Paris and London are favorites for art and cultural events, but your likes might be difference.

Almost every cafe has terrace heating now, so even in this weather, terraces are pretty packed. I read somewhere that we now have the temperatures Bordeaux had in the 1980s.

Ah global warming has its benefits! Yes they had those heated outdoor cafes when I was last in Amsterdam about 5 years ago. Hopefully grim predictions for global warming or climate change more properly is that the Gulf Stream could be altered leaving northern=western Europe into some kind of ice age- but long after we are gone I guess so let's take benefits of warming in Amsterdam while it lasts.

Coincidentally looked at a climate adaptation website yesterday for the Netherlands: fewer cold days in winter, a larger number of very hot days and very hot spells, more extreme weather, mostly more extremely damaging storms. Not "long after we're gone", all happening now, and in patterns that top more conservative predictions based on climate modeling. It's an effect outside model parameters and it's unclear why this is happening.