That's a great question.
About 60% of Canada's electricity is produced by hydro right now. As you note, that grid is aging. However, there are new technologies coming behind that, which will be able to produce power at much lower rates and store it in ways we can't even imagine today.
It was inconceivable even five or 10 years ago that we would have renewables—solar and wind—below about 5¢ per kilowatt hour. Just over the last couple of weeks, Saudi Arabia has bid out a new solar array at 1.04¢ per kilowatt hour. That's for the production of the renewables, and it's plummeted in cost. Canada, I believe, has had 9% growth in wind. I'd have to check on that.
Also, on the other side of the equation, is how to store renewable energy. Right now there are companies in Canada, like Hydrostor out of Ontario, that are building very large grid-scale storage facilities in California, such that costs of storing electricity produced from renewables are going to be plummeting. This, combined with Canada's existing nuclear plus hydroelectric, puts us in a very, very good position. If we are going to produce things, for example, like clean hydrogen from electrolysis, we're going to have to scale up our generation across Canada.