I hear you.
Most of that 80% reduced cost for the MVTG fuel cells versus Ballard's PEM fuel cells is based on the raw material costs for the off the shelf purchased materials. The futures market price for iron, nickel and platinum are well known facts. Ballard uses platinum, MVTG uses cheap common metals like iron and nickel for the catalysts. Just compare the futures prices. So there is no real speculation as to what the facts are.
It is well known by those in the fuel cell industry that the Nafion membranes from DuPont needed for a car sized PEM fuel cell cost more than an entire ICE engine from Detroit. Also the Platinum used in a Ballard fuel cell costs about the same as an ICE engine. So just 2 raw off the shelf materials that MVTG eliminated cost more than 2 ICE engines for a Ballard PEM-Fuel cell. MVTG has eliminated the need for a membrane in the MVTG MRFC fuel cells. The MVTG fuel cell has NO membrane, thus zero cost for a membrane, and the platinum cost reduction is nearly 100% as well!!!
I base the 75-80% cost reduction on making them one at a time if needed. In fact, I do not think Ballard is even making their fuel cells in enough volume yet, due to low volume, to even be considered to be making them at scale. The raw materials and parts they use, like the DuPont Nafion membranes are made at scale, but that is a material bought from DuPont off the shelf.