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?
I use it all the time. Dump dishes into trash, rinse everything that sticks off in sink, grind up all the food bits from that in the disposal, put dishes in dish washer.
It’s only gonna get gross and smelly under your sink if something is wrong with the disposal. And if you’re not throwing a shit ton of garbage down it, just the little bits that wash off when doing dishes, it’s not likely to break or get clogged.