Most people live where solar makes sense, and that's only going to be more true as a) more people are born in those locations, b) more people move to those locations, c) those locations expand as solar gets cheaper, and storage becomes cheaper.

The UK is surprisingly far north. It's always surprising to me what North American places line up with European ones. Luckily for northern Europe, they have lots of other renewable resources to make up for the lack of sunshine.

I think possibly your opinion on Solar is a bit too UK-centric, since it's already very competitive in other locations, particularly anywhere that air-con is commonly used since that electric load is correlated with solar activity.