As we get more and more renewables then there will soon be a time when cheap mains electricity
That will be the day - if they ever do. The countries with a lot of renewable energy - Germany, South Australia, have the highest cost electricity in the world. Those countries with lots of coal fired generators have the lowest cost electricity in the world.
The smart meters have one main function - to cut off your power when the renewables can't supply enough and they have to have rolling blackouts.