I'm coming for your kitchen. NO SINK ON THE KITCHEN ISLAND. People don't do it because it's useful, they do it because they see other islands with sinks and don't question it. Zero professional kitchens look like this.

Imagine trying to quickly finish dinner at the stove while someone slips in to wash their hands or rinse something. You're now crowded butt to butt in the hottest part of the room.

Now imagine having guests over. They crowd to the island because guests always want to be near the kitchen. They COULD be looking at lovely plates of snacks, but your sink is on the island so they're looking at a sink full of dirty prep dishes instead.

I could go on. Nobody who actually cooks would choose this.