Don't get me wrong I understand it's safer, but I also know sometimes it's impractical, for mine there are both fast growers and big kids my just turn 3 year old has been in a high backed booster seat for over 6 months now she 17kg wears 4-5 going into 5-6 clothes, but if the law changed I woundnt be able to use the car for her, now for preschool and shopping? fine a incontinence at times but I would just walk or get the bus I do half the time anyway, but for her speech therapy I would have to stop it the travel would mean if something even a bus is 10mins late I don't get home for my son after school or we don't get to speech therapy (3 hour bus, 2.5 hour train ride one way)
I like the current rules both sets, both sets are for different types of car seats why change something that works?
Even with my son we couldn't find a size 0+ to fit in are car we were struggling to fit him in the size 0 at 6 months old he was the size of a 18month old we had no choice but buy a size 1 forward face, he's now 5 been in a high back booster for 2 years