I use my Brompton in ways which are not on its label.

Besides rides in the city, I take it on long 100+km rides on the road, on gravel, forests, rocks, mountains.

It has taken me on every street of Barcelona and around it many times over. I've had it for 14 years.

Because of the small wheels it's extremely agile and allows you to go really slow without losing balance. This makes it like a sharp knife in the city but also off road on rocky trails, steep climbs, eg. in places where you'd never think of going with a Brompton.

If the trail is impossible, I can just lift it up and climb with it on my shoulder. Or I can fold it and carry it like a bag, on the metro, trains or in the trunk of the car.

As I understand, I'm not the only one using the Brompton as a gravel/mountain bike, so they released the G-line, which I still haven't checked out, but it's on my bucket list.

If I were to write one eulogoy for a piece of equipment in my life, the Brompton is definitely it :).