Oldest kid diapered in public?

Kinda random question, but I saw something today that made me think and wonder. So today I was out with the little one and I needed to change his diaper. So while I was changing him, a mother with probably a 5/6yo walks in and starts changing her son right next to me. I didn’t say anything and just minded my own business, but it made me think, he’s a little old for diapers. Anyway, I was just curious is this something others have personally encountered. And also I am aware there could of been a disability or something so please don’t get on me about that. I’m not judging or disrespecting that mother and child, I’m just curious if other people have seen something like this.
Oldest kid diapered in public?
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