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Disagree with the British way of cabling though, left front frees up the right hand to downshift into a lower gear while slowing down.
As I said, you can do both in one movement pretty nicely with STIs, which might have been the point of the swinging brake lever? But in practice it's not a huge advantage, unless you're racing crits, and even then it's not a big deal I bet... I'd rather be able to shift and (meaningfully) brake with one hand in case I'm using the other at the time - maybe I'm having a drink or a bite, or carrying something home from the shop or maybe something I found on the side of the road.
The one-handed simultaneous brake and downshift is actually possible with Ergo and even Doubletap, although perhaps too fiddly to bother... electronic stuff opens up the possibilities.
Disagree with the British way of cabling though, left front frees up the right hand to downshift into a lower gear while slowing down.
Back to front brake only, get a lot of 'Do you not flip forward when you brake?'. Nope!