If renewables start straining the grid, they'll just face economically infeasible grid connect fees, reduced or negative rates. That's already the case in Calif

If renewables start straining the grid, they'll just face economically infeasible grid connect fees, reduced or negative rates. That's already the case in California. Power companies don't get to just start supplying electricity to the grid at will; rather than the grid breaking, operators will simply say "no more". At that point, the only urgency will be an artificial, political one.