If that's in reference to OMNY, it's worth mentioning that Paris is actually far behind e.g. New York and London in ease of use in ticketing and turnstiles since in those places you no longer have to even buy tickets or think about anything: just touch your normal payment card on the turnstile.

Although that does seem like the easy part compared to actually building the stations and lines, which is why it's weird Paris hasn't caught up in that area.