Yes, I've planted them out in the garden in summer. One year I forgot to bring some indoors and they stayed out there for several years til an extra cold winter finished them off.

Yes, a lot of people give their houseplants a little 'holiday'. When you bring it back in again, check it over carefully for 'critters' that might have taken up residence.

I had a big pot of them which I left outside. They lasted three years then disappeared!

You can even use them in bedding schemes if you have enough rooted offsets.