Different people aim at different features in their bikes. I aim at utility under my circumstances and am about finished tweaking my Brompton. The highlights, some of which were individually reported before, are as follows:

• 27 Gears, in practice 15, evenly spanning the range from 1.05 to 8.6 development meters
• Twist shifters, with operation aligned with that common on bikes
• Rear rack equipped with stronger than original, titanium stays
• Added transverse roller wheels to make it possible to roll the bike like a suitcase
• Two kickstands, center & rear, to make the bike stand with a fully loaded 15kg+ T-bag
• Lock bag holding an Abus 6500 folding lock
• Accessory bar taking phone, radio, power banks, camera etc.
• Cloth bottle bag that also serves as a container for small pieces and has a concealed pocket with a USB charger and spare cable
• T-bag turned into a backpack

You might say that I could start with a Bike Friday and have a lot of gears and twist shifters at that start, but I cannot make the BF's fold as small and convenient as Brompton's. Photos illustrate the features. I should now pause now with tweaking. The weight is 15.6kg w/o lock and 17.2kg w/lock (you are free to laugh here).