DD turned 3 in March and is currently still RF'ing and mostly is fine with it. But the air vents in my Odyssey are in an obnoxious location (on the door against the window-who designed this?!) and she is SO hot when I get her out of the car these days even with air blasting. Also we are going to be driving about 10 hours in about a month and it would be really nice for her to be FF'ing so she can just watch dvd's on the player with our 6yo so the bigger kids can use the portable DVD players for their less little kid friendly movies (not to mention she pauses it and messes it up over and over and over accidentally. )
I know RF'ing until the limits of the seat is ideal, and she's not anywhere near that (average size 3yo), but I also only RF'ed my other kids until around 3-3.5 for similar practical reasons, I'm just hesitating this time I think because she's our youngest and I know it's technically not "THE safest" thing to do but I also kinda feel like 3 yo + 3 months is a relatively safe time to turn them...(If I don't turn her in June, we will for sure by late August when she starts preschool - drop off car line.)