When I was growing up, these seemed to be ubiquitous and I never liked them. They seemed overcomplicated for the purpose, and created a gross and smelly area under the sink that needed more cleaning.
I haven’t had one in years, as a simple sink mesh does the same job. But I don’t really know how other people are. Are under sink garbage disposals still common, and commonly actually used by people here?
Not really a thing in Canada either. Bought a reasonably midrange ($600k) brand-new apartment back in 2006, it didn’t come with it. Also have never seen it in any other house that I’ve visited, except for the wealthy. And by that, I mean in a house that you would normally pay $4-8 million for. Which is certainly upper middle class where I am, but not overly wealthy.