With the Metro Card there was a swiping technique. You could easily tell who was a tourist by how many times they needed to swipe. Not to say I was always perfect on my swipes, but I would need to reswipe about once a month maybe. With the OMNY card there is no technique so if the machine doesn't like you there is nothing you can do so you move to the next turnstile in the subway. However, you can't do that on a bus, so you tap tap tap and it keeps turning red and there is nothing you can do.
This "new and improved" system is terrible. It is way inferior to the Metro Card. The only point of OMNY is collect data on New Yorkers to sell. I really hate this new system. It literally helps no one and stalls traffic.
Also getting rid of the Unlimited card was a terrible idea. The MTA is on a generational losing streak.