They had a compulsory daytime headlights rule in Poland for many years from November to March - the grey months. I suppose Polish roads are a bit similar to those in Scandinavia, in that they are broad, straight and not terribly busy, and most of the drivers are doubling the speed limit, straight up the middle of the road between two trucks, daring each other to give way. In those conditions - well, it's a sop for enforcing rules and altering driver behaviour, but in as far as those conditions are present, it makes sense. In town or on busy roads generally, not so much. Now they've extended the rule to cover the rest of the year.
DRLs are a bit different - because they're automatic, because they're usually front only, and because they're not designed to cast much light on the road. So when you enter that tree tunnel, the car shows up but the driver's view of the road doesn't improve so much.
It's hard to fix DRLs for non-motorised vehicles and pedestrians, so compulsory hi-viz is the logical answer. Could be a bit uncomfortable in this weather. Thankfully it hasn't got to the UN yet.