If people can make it work for them, good on em.
If you're considering it, maybe study some of those past attempts. Try to reason through the conditions and contradictions they faced, both material and interpersonal.
But, also, that don't scale. I am a 21st century ape, just one cell in this organism called city. I don't know how else to exist. There's no folding this back in the bag it came in. Hundreds of millions of people aren't just gonna start living agrarian lifestyles.
I'd like for this thing I am a part of to not be a parasite on the natural world, to strike some homeostasis within the overall biosphere before we totally tank it. Can we do that? Is it possible? That's the really interesting question, as far as I'm concerned.
Maybe we can't. Maybe "modern" ends, whethere all at once or the long drawn out decline over several generations. I'm fairly sure whatever happens after that, people will find some new/old/synthesized way to live. But for now, some of us have toilets. I think it would be nice if everyone could have toilets. And everyone's children and everyone's children's children could also have toilets.