Children will remain children regardless of their form.
Remember the past, books, films.
At any time, in any country, form or not form – what has it changed in schools?
Maybe schoolchildren in the same clothes look more careful or belong to the same community.
But buying a shape now has become no cheaper than just buying different clothes and changing it when you want. From the shape in a year the child can grow, it can not be washed in the middle of a week (or you need to have a spare kit).
And stand out and if there is a form, the rich will find a way.
Even in the sleepy sovka of our childhood, when the whole country was dressed in the standard shape, some could wear expensive deficit shoes or gold, sports costumes or shoes that were not in the store.