The grid problem is a distraction, for the most part. It assumes we need to produce electricity in one place and send it somewhere else in high amperage. Solar excels in local production units, especially in home use, where it simply replaces what was going to come from the grid with local power. No grid upgrade is required for this.

In the mid-range, community solar (<10MW capacity) is easily handled by local distribution with simple modifications on billing/metering.

The one place that the grid capacity comes into play is for Utility Scale projects: where >10MW solar fields have to be placed in remote areas and feed power to cities or factories.

When you think about the historical reasons for that (cities built around ports, factories built around cities for cheap labor), then we start to see that it is simpler to move people out of cities to reduce the load on utilities, and build factories in conjunction with solar construction and automation, so that large grid transfer, and all new cross-country grid wiring, doesn't have to be constructed.

People have cars and legs: they can move. High power grids are anchored in thousands of tons of concrete.

We keep trying to run the steam train, slave labor and war economy with nuclear power instead of coming up with a streamlined economy that is reflective of new ways for humans to live where they are useful to a place.