I honestly believe this is the only way to get ERF into mainstream use in our country. The default neess to be the cheapest and laziest option. if they already HAVE a bucket that goes to 35 pounds,most parents will just keep using it. It is easier and cheaper than going out and buying a new seat. Hopefully, the kid will get to 2 in the big bucket. Then, the ff-only combo seat is a decent choice. simple, 2 steps, no convertibles to confuse people with rfing and ffing beltpaths, and the option to ff at 20/22 lbs, etc.
I know most people here don't want to hear it, but we kinda already have that.
I really believe that Graco hit it out of the ball park when it comes to the SS1->GN set up. It will get almost all kids past a year RF, most to at least 18 months, several to two years or even more. After that, the GN fits wonderfully and will last until 6ish in the harness and forever as a HBB or backless booster. It might not be the very bestest ever, but it's dumbed down for the masses and it's very good. My giant kid outgrew the SS1 heightwise around 18ish months in paper diapers (I think, we didn't use it full time after about 14 months and didn't use it at all after a NYC trip when he was 16 months, and then he only fit in it in paper). By then, the vast majority (I'd say 97%) of people have their kid FF. They don't WANT their kids RFing, and most of them plum don't care if it's safer (most parents don't care about car safety in any form... if you need convincing of this fact, stop ten random cars and check the tightness of the harness... the most bare bones part of the whole thing, and they still can't be bothered). A lot of them really would be swayed by the big bucket, especially if it saves them from "wasting" money on another car seat. Then they go to a Nautilus, which fits my big 3.5 year old (and I've never IRL seen a kid his size in a harness, unless you count Seamus and I didn't actually see him *in* the seat) with tons of room to spare... easily fitting him until 5, maybe even 7, until he needs a booster, which he *could* use the GN for easily and safely.
So, you see, we've got a great system on the market. Not an utterly fabulous best practice all the way system, but a really good, easy to use, relatively inexpensive system that will get almost every child to the minimum requirements (and why should they go past the minimum? Most people still believe legal=safe, which is why smoking is so popular) and the majority of them comfortably past the minimums.
That's it! Abolish all other seats! We will be a nation of Graco babies!