Businesses don't usually just completely overrun entire neighborhoods, and "opening" doesn't mean "do whatever the fuck you want". You can still specify that you don't want night clubs or auto shops in a specific place.

Mixed zoning is the norm in Europe, and it sure as fuck doesn't ruin any neighborhoods, quite the opposite in fact.

It's funny, because mixed use zoning is some of the most desirable places to live in terms of market value. People don't want to drive for. Every. Single. Thing.

it’s as if you think the alternative is businesses being like “alright boys, suburbs are on the menu”.

of course there’ll be regulation, mixed use zoning doesn’t mean chaos.

That's not how cities work.

Home based businesses are normal in Canada where I live, people have hair, massage, other aesthetic studios, small scale businesses, professional services like counselling, etc. Heck, you can even rezone some corner properties to a neighbourhood commercial zone that only permits a handful of uses like corner stores or coffee shops.

The less homogenous a neighbourhood is the better it is for everyone. Unless you like being a slave to your car and driving 15 minutes to the store when you forgot milk.

I see you've never lived and worked in a pleasant walkable community

What do you mean by "others"?

That's why you set limits and have laws/zoning that allow some things and not others. It doesn't have to be all or nothing.

no, it won’t. where did you get that idea from?

Absolutely ruined, dreadful and downright hostile these mixed streets