I just installed incineration toilet at my cabin. Works great and burns the shit to ashes. Works with a gass balloon and a 12V battery. 220V option being available.
I mean, I grew up with a well and septic tank and my life was literally no different than living in an apartment in the city. It’s not like a radical off-the-grid thing millions of homes are this way.
I can envision local electricity generation and wireless communication. But not every home can support a well and septic system.