I love my little stock folder and yes I ride In the top gear now and then, It's an 8 speed.

But If I want to go fast I take out my fast bike

Right tool for the job ya knows,,,,

And the cost of the XX1 ,,no thanks I just Upgraded the worn out system on my mountain bike with the Shimano Deore XT M8000 1x11 for less than half the cost of the XX1,,
Only thing the small cassette gear is an 11 tooth but still,,,,
I'm told by those who have ridden both this system shifts just as well as the now over priced XX1...