I appreciate that in Nordic countries all season tyres are not adequate in the winter. Summer tyres and a swop to full winter tyre makes more sense, indeed essential.
But in Norway is there is an exact date, geographical location or weather condition that makes a summer tyre the correct choice one day, and winter tyre, maybe with spikes ,the correct choice the next day. Not just a date when its legally required, but actually most suitable. For the whole journey even if starts with one tyre being best and ends with another being better. Or tyres changed early in anticipation the weather will change. Is not some of your driving a compromise, on totally the wrong tyres, for some of the time? I've noticed this in other countries. Winter tyres tend to be left on for longer than necessary, when summer tyres might have been better, and safer, because changing is inconvenient .
I'm not suggesting you use all seasons but it may explain why they are popular in central Europe. Here the weather is less predictable. It might snow, but usually doesnt. All seasons perform well enough in all conditions. Occasional snow or, motorway speeds on dry tarmac in summer. A small compromise on performance all year round maybe vs being on totally the wrong tyres for shorter periods.