Norway: large hydro resources, low population. Costa Rica: 80% hydro. Scotland: https://www.bbc.com/news/uk-scotland-56530424 says that renewable met 97% of energy demand, which does not mean that clean electricity was produced when it was needed in Scotland. Considering that this means the country could run at 97% of its production potential with only RE is what I consider "creative accounting". (the article does not lie but interpreting it that way is mistaken). Uruguay: only 31% hydro, that's more interesting. New Zealand: 55% hydro, 13% geothermal.

So except for Uruguay (which does look interesting), most countries mostly use renewable dispatchable sources which are perfect. But not all countries have the hydro potential / population ratio of Norway. We should use hydro as much as we can but we are limited by geography; once everything that can be used is we are stuck with nuclear, wind or solar. Maybe Uruguay could be an example of country that manages somehow with mostly solar/wind; I need to look into it. Thank you.