Okiedo , thanks for giving me something to research . After reading all material and xtra - yes they have interesting concept but no serious investment or big money behind them unlike QS. As you noticed QS has all the backing and ready to go into production in a year ( or  two if I rem correctly) . GMG has none of it , no production facility, no financial backing.

Looking back at History as an example: we old timers remember  late 1970 th battle between VHS tapes and Beta, last one had better quality, better technology, but VHS won. Why? New ideas will constantly pop up science might come up with something little better, but industry can not be jerked around every time , every 6 month with new idea or concept, manufacturers has to act, pick one , invest serious money and start building production plants which takes few years. So as we said goodbye to Beta and lazer players so and different ideas might have to wait and put on a shelf till better one and revolutionary come up to push technology to the highest level .

 All ahead with LAC and lithium solid state B.