There are grid connection delays of 8 to 10 years for lots of renewable energy projects, as the grid wasnt designed to have many small inputs, so its not like there arent issues there too, and thats before you start getting into reliability issues once the percentage of non-dispatachable energy gets higher.

In general both need to be invested in heavily, and structural reforms done, if we have a chance of actually meeting climate goals. Thankfully that seems to be the plan.