I know several people who bought modified Bromptons from Ben Cooper and are very happy with them.

I, however, am not willing to spend that much money to get non-rim brakes and/or a wider range IGH.

Hence my suggestion to Brompton to offer those as options when ordering a new bike from them. It could only be cheaper than making and replacing those parts after sales.

But considering the vast majority of people only use the B for its intended purpose, ie. riding a few kms/miles in the city… I'm not holding my breath.