Na dude, they are chill. They produce more under your friendship so you can keep a little. If they think the relationship is going toxic they just leave. It's awesome

Yeah, it's basically this. Most wouldn't survive winter.

How do they survive winter? Do they hibernate, go south or stay?

They mostly enter a low activity state and cluster in the hive to stay warm and save energy/honey. If it gets warm enough outside on occasion you will see them leaving the hive to poop and push the dead bees out.