<font face="Verdana, Arial, Helvetica, sans-serif" size="2">So for those flights - you're out of luck regardless of whether you're on full Y or H. You're out of luck whether you could upgrade at time of booking or 2 days before departure.</font>
Which of course means there is no longer any point in buying an upgradeable fare, so you might as well go back to buying N/Q/L fares.
Oh well, it's still pretty easy to upgrade on YVR-MSP.