@ GlobalNav...
Well I don't understand why it would be expensive in the USA when it is not in Canada for both private/604 (which is the same as pt91) and commercial/704 (which is similar to pt125) operators.
I agree with you that hopefully in the future EFVS will be the way to go but in Canada we are still at this time not allowed to use our EVS system on the Global to lower our visual minimums... We cannot take credit of the EVS because TC never approved it. We hope to get TC to change their mind about it and also get credit for HUDs for lower vis.