The oldest child I had of my own that was still wearing diapers full time and not potty trained was 4 years and 11 months of age.
A month before my oldest sons 5th birthday he took his wet diaper off on his own in the morning and went to the toilet.
I never potty trained my kids and they eventually potty trained themselves as most will.
Kids are only little for so long and I want the kids to stay in diapers as long as possible.
They have years ahead of them to use the toilet so I'm fine with the kid wearing diapers and I can afford the diapers anyway.
My 2 year old is still not potty trained yet and I have a few more years of changing his diapers but that's okay and I'm not gonna try potty training him.
Eventually when he gets old enough he'll likely want to stop wearing diapers and use the toilet.
I've babysat an autistic 8 year old boy before and he was wearing diapers full time because he cannot use the toilet.
So I changed the 8 year old boys diapers and he hated clothes too so he would always want to just remain in just a diaper in my house.
I just kept the 8 year old in diapers and let him be that way and play on the floor or watch TV.
He actually looked cute sitting there on the floor wearing just his diaper and playing with toys.
The last time I had my diaper changed was when I was 3 years old and not potty trained.
After I got near 4 years old I was out of diapers full time and in panties and using the toilet and no longer needed a diaper change.
So the last time someone changed my diaper was many years ago when I was almost 4 years old and still in those old pampers disposable diapers.
I remember hating to use the toilet but also hating to wear diapers.
I remember as a 3 year old running away from my mom or dad when they told me it was time for a diaper change.
I would see the diaper in their hand and then take off into my room.
My parents always caught me though and changed me.
The oldest I've changed diapers on was my youngest son who was 3 years old and he finally potty trained at almost 4 years old too.
I still change diapers on a 2 year old son I have and will be changing his diapers for awhile now.
My kids always just potty trained themselves.