Share 'Potty Training a 4 Year Old'

I'm curious to see when potty training began and was complete for those families that didn't force or teach potty training because of preschools.  My son stays home with me and has never been to daycare.  Despite many attempts of training him, he refuses to go to the potty for anything. He's soon to be 4 and still in diapers.  Personally, I don't care and it doesn't bother me and I have no int…