There's a plethora of compact 16" bi-folds that are a credible alternatives, take a RD and:
- offer a greater gearing range than a Brompton,
- are lighter,
- much less expensive,
- carry zero proprietary parts and
- take the cushier, more comfortable ETRTO305 wheel size.
- Don't flex and can be more efficient due to having no suspension
I myself have even toured on such rigs. No, you don't need a BF or Brompton to tour long distance on a folding bike.
FSIR Spin 3


FnHon Gust 16"
You just have to take off your own blinders (and stop taking advice from the unimaginative, parochial, two-trick Brompton & BF pony channel gurus here) to see that there are actually a lot of credible, competent alternatives to a Brompton. Here's another example:
Litepro Spyder, build-in-progress with an 11-40T dish in the back
SF hills and climbing? No sweat. These rigs can be set up for very steep climbs indeed.
3000masl+ volcano in the background
In the clouds at 1,300masl
Origami sells something similar in the U.S.