"even though new low-carbon electricity may not be cheap" Now there is a understatement , just look at Ontario.      " and would require greater reliance on renewable sources." Which is a big reason(but not the only one) why Ontario is in the mess it is in.
see: .theglobeandmail.com/news/national/ontarians-paid-37-billion-above-market-price-for-electricity-over-eight-years-ag/article27560753/
When checking IESO at 12:00 pm , it  was showing a total of 1694MW from wind ,solar ,bio , and imports , while we were exporting 1635MW at the same time.