My built in generator gives me lots of options.
Some are very simple. I can stop for lunch or breakfast at a Cracker Barrel and and leave the dog in an air conditioned trailer.
I can stop for a nap and have A/C wherever I am. I can boondock or stay at a marina and have electric.
I can overnight at a Walmart with full electric. Power failure at a CG I have electric.
Honestly I don't do any of those things often or regularly, but I have done them all at one time or another.
Having a genset allows me to be fully self contained at all times which gives me lots of options and different way to use my RV