Base load is a misnomer. Nowadays people talk about dispatchable power. base load is an economic forcing function to justify high efficiency "always-on" generation models. Nobody actually wants this, as much as they want power when they need it. Synchronous condensers, PH, and fast response batteries with some topping up from gas turbines could be as good. Base power is just the low engineering effort answer.

There are other answers than "base load"