From New York State:

Using Excelsior Pass is entirely voluntary, but it requires learning about the state’s system and mastering a few different websites and apps. It took me 20 minutes over Zoom to help an octogenarian set up his pass, though it was certainly simpler than mastering vaccine-appointment websites. And even when we thought we understood the system, Excelsior Pass didn’t always work: My tech-reporter colleague tried to use it to enter Yankee Stadium, but the system didn’t update with his clearance until after the game was over…

Testing Excelsior Pass, what surprised me most was how easy it is to fake. When you first sign up for your QR code on the state website, it asks a handful of questions based on your vaccination and testing records. But after that, you’re on the honor system — you can add the QR code to any phone without any more challenge questions.

Designed by IBM, here is the full story.  I get that different parts of the country (Michigan…surge vaccine supply!) may need to proceed at different speeds, but basically it is time to plan a full reopening, and it seems that vaccine passports are more likely to hinder than to help achieve that end.