It's really wrong to blame the banks. This is driven by customers who don't go into branches - which is the large majority of us.

Ultimately banks which retain physical branches will become uneconomic and lose customers to cheaper internet only outfits.

The only way of serving the internots would be to charge a large monthly fee to finance the branches and the inevitable loss of internet savvy customers. This is still be unattractive to banks as it would be a declining business as their customers die off.

Switzerland is kind of behind the curve in that there's loads of branches everywhere and loads of people use their very expensive cantonal bank. That will change as it has elsewhere. Id expect declining localism and more branches shutting. Realistically mergers of cantonal banks (whilst retaining local branding) will probably be necessary.