mtb gearbox (again)

https://www.pinkbike.com/news/praxis-unveils-a-new-folding-cog-gearbox-sea-otter-2025.html

Praxis are having a go at one of the just around the corner technology see
year of the Linux computer and Hydrogen cars.

This said while for normal bikes I’m not convinced as generally gearbox’s
are quite draggy, but mated to a motor ie E MTB which do eat chains and so
on, or cargo bikes seems a better application of the technology.

Roger Merriman