I have four grown Children. Each one Unique. I used Cloth Diapers most of the time.
My Sons were both close to Three when they gave up Diapers. We had quite a few wet beds and lots of work!
One daughter completely gave up Diapers day and night when she was only 15 months old. She would climb over the bars of her at night to go to the potty. She couldn't tolerate wetness against her skin.
The Younger daughter rather enjoyed wearing Dirty Diapers; she'd sit in a corner and suck her thumb. She was past three years old when she started wearing Big Girl Panties but she was a Bed Wetter throughout Elementary School. We allowed her to wear a Disposable Diaper at night. It was much easier than washing Sheets, Blankets and so forth on a Daily Basis.
I suggest Not to Make a Big Deal out of Potty Training. Unless a child is physically or mentally disabled, they all eventually get through it.