A few months ago I picked up my Brompton, which I've had for more than a few years at this point. It's been on trips with me to various part of the US - when I've had to fly - and in this segment I went to pick it up via Cargo bike and it became a bike in a bike for me.
So far I've used my Brompton for:
Trips where I'm flying somewhere and will need that compact size, such as via flights...