If HSJ couldn't push extracting this extra Indium across the line due to lack of Indium whilst being better than PERC and TOPCon PV in every other way, it seems

If HSJ couldn't push extracting this extra Indium across the line due to lack of Indium whilst being better than PERC and TOPCon PV in every other way, it seems doubtful that one photocatalytic method out of a bunch can displace a PERC cell and an alkaline electrolyser that produce about the same amount of hydrogen per m^2 without the expensive vacuum deposition step. More methods are always good though and hopefully the barriers to commercialising this method (or one of the others) have workarounds.