Let's be honest here--nuclear is not "ideal" for baseload, and it is indeed inflexible w.r.t. power output. What's actually ideal for baseload are fossil fuels. Unfortunately, those aren't going to be an option going forward, so we have to choose between a number of less-than-ideal options. I think it would be better to be realistic about the tradeoffs of those options than to try to argue that we actually aren't giving anything up.