There is no standardization in testing here. He compares bike ABC with different groupsets, bars, and wheels (incl tyres type, size, wheel depth, spoke type) plus a whole bunch of variables with what looks to be minimal testing time (first impressions). Unless someone sets up bikes with exactly the same components and A/B tests them back to back in set conditions, then isolating and commenting on the frame's "performance" would be mighty difficult.

does anyone know of any solution similar to 12speed garage door opener?
I expected to have seen something in Ali by now, but no sign... I find the product really well thought, but being outside the US and with exchange rates the 'original' option is not feasible

I remember Trace Velo had problems with his FD not working since it couldn't communicate with the RD which was most likely the main receiver for the shifters. The FD itself doesn't communicate directly. Though it'd be interesting to know if you could mix shifters across various electronic groupset. Like using the LTwoo AE MTB e-shifter mechanism (not sure what to call it) with ER9/X shifters. That would open up the possibilities for other 1x drivetrains at least.

Ltwoo already have flatbar electronic shifters in their cazalogue, just dont seem to be selling them yet

But this is way more expensive than any other catalogue frame from a Chinese brand. 

I don't see how they can sell these at either the PP or domestic Chinese price.  Disregarding the frame itself, just look at the paint jobs ... they look awful for this price.

I had the GR9 hydraulic levers paired with the Zrace XG calipers, design, weight and color choice were attractive at the time.
My experience with the calipers was less than stelar... the back brake did never work, even after several bleeds. The brake feeling was always soft and not very assuring on steep downhill rides. Installed the heavier L-Twoo calipers and breaking feel and performance is now good.