I think there are lots of factors . Traditionally one parent was home and most weren’t in childcare all day … so far more time to train .
i was born in the 70’s I. Terry nappies - my mum had a twin tub so definitely motivation to train also modern nappies - children feel less uncomfortable when wet ..
I also think this idea of waiting till they are ready is not helpful at all .
My Ds was only diagnosed with ADHD in year 5 and Asd I. Year 8 .. he was toilet trained by the time he started school but it isn’t as simple as say exciting sn’s
The whole of education does need looking at holistically .
There is an increase in Sn’s - inclusivity is pushed without funding which not only fails the children with SN’s but the children without who aren’t able to learn .
The lack of funding is destroying everyone’s education .
we absolutely need to look at what is happening to our children and what they need .