You should keep your older kids in diapers as it's much better for them than having to use the toilet.
Yes you should keep your child in diapers.
Kids should always be kept in diapers instead of being potty trained as diapers are much better than the toilet.
When your kids wearing a diaper they don't have to stop playing to use the toilet as they can just go poop and pee in the diaper and have the diaper changed later.
I would never potty train any of my kids and keep them in diapers.
Using the toilet is a waste of time when you can just pee in the diaper instead and poop in the diaper.
Diapers are also more comfortable than underwear too.
And diapers get even more comfortable when they are wet.
They make larger sizes of diapers for older kids and they should wear diapers all the time.
No need to stop for potty breaks as you just potty in the diaper.
Here's an older kid that is wearing a diaper and he loves wearing his diapers.