Age for POI ?

We started POI at 2. But, I’m wondering if it would have been better to wait until 3 and just do bits now. POI requires a higher order of auditory processing than BOI. At 3, they are much more verbal,have a richer vocabulary, etc. What age did you start POI? What would you do differently? With the new POI collab starting, it made me think. I would also love to know how many people are doing POI at all?