A developed country has a lot of old dirty generation and the problem becomes how justify/force the abandonment of systems that are producing cheap power and replace them with clean power.

Here in the US, because we are making progress with efficiency, we don’t need much or no new power. We need to shut down coal which is giving us cheap (at the meter, not in reality) electricity and replace it with clean sources which seem to cost more.

Many less developed countries adopted cell phones much, much faster than did the US. The had no land lines or such marginal land line service that cell phones brought connection to people who had no access to a old-fashioned phone. In the US, people had lots of phones in their houses and offices. Not as big a need for a new phone.