I am an advocate for extended rear facing as well ... unless a parent absolutely refuses I prefer them to rear face until they reach the 35 pound max on my car seats! I also will not move them over to the 'high back booster' just because they have reached the 40 pounds and 40 inches because the 5 point harness is the SAFEST seat belt option out there and if I have one empty than you sit in it until you are 65 pounds and too tall for my 5 point harness

Ideally ALL belts in cars should be the 5 point hardness style ... this is why race cars and other high speed vehicles have them because they help ensure 'even impact' to the spine in an accident ... however society is just so use to the lame ass ones we have because initially we had NOTHING so they think these are 'fine' but unfortunately there are more cars on the roads and going FASTER than ever so the incident for death and severe injury are higher which is what is leading to more and more 'stringent' safety rules in vehicles cause too many people die needless everyday

I took the Carseat Installation and Inspection course to be a Installer at Clinics .... the videos of accident simulations are HORRIBLE with the forward facing impact and the amount of force on the neck and spine of a young child ... I would rather have a child with a potential broken leg from rear facing than a broken neck or spine from forward facing too early!

Same with watching children in just the lap belts being thrown from the vehicle entirely because they seat belt was not worn properly and so forth!

I have had to 'educate' every single one of my parents on proper seat belt position in their carseats because every single one had them TOO LOOSE and had they ever been in an accident their kid would have flown out of the seat regardless of being rear facing or forward facing