The few I've seen have been people with only one sink (so, a single large depression), which makes it easier to wash and rinse. But if it's not large enough, n

The few I've seen have been people with only one sink (so, a single large depression), which makes it easier to wash and rinse. But if it's not large enough, none of them fit, so it's mostly an exercise in futility. And yes, dishwashers are absolutely everywhere. Some don't have them of course, but they're standard fare in a huge number of places, even relatively cheap apartments.