As much as you need. Modern designs are modular - chain together as many as you need to provide base load and also provide some overage so you have coverage when they do inevitably need servicing.

Or since they are modular if significant long term loads shift geographically, you can easily move them around to where needed too.

I agree the concepts of massive plants aren’t desireable - luckily there are alternatives if we can ever get past the emotional arguments and actually discuss things rationally.