35b was expected for 2016 but wasn't ready, the Germans say. The improved 35b vectored VDSL uses more spectrum to get speeds of 200 megabits or so up to 300-400 meters. That's not close to the 500-800 megabits G.fast can do over short loops but in some cases saves the telco a lot of money. G.fast can't share the wire binder with the old 17 MHz VDSL but 35b can. Deutsche Telekom has millions of the 17 MHz modems they don't want to replace so chose 35b. Unfortunately, the new systems aren't delivering what DT requires.