Well, it's goodbye to Denmark from me. What I have learned here is the following.
1. Pedestrians, kids and the disabled come first. If there is a pedestrian area, you get off your bike, no argument;
2. Widespread hard separation is a good thing, although it is not necessary for it to be ubiquitous;
3. Narrow streets do not mean cycling provision gets sacrificed or is 'unrealistic' (an argument used by many different groups in the UK);
4. A more relaxed attitude to getting where you're going benefits everyone and there is very little aggression - I have seen no accidents, no arguments between cyclists and drivers, no helmet cams or overprotected cyclists - some wear helmets, some don't and people seem to feel no need to have any more than basic lights at night;
5. Proper cycle parking all over the place is the basis for widespread bike use, especially at train and bus stations;
6. Integrated transport and a sensible attitude to bikes on trains works - of course you can take bike onboard, and yes, there are special carriages with extra space for bikes.
Next stop: Tokyo for a year. It's all a bit different but no less interesting for cycling...