Still using infant car seat?

M

Anyone still have their toddler in an infant car seat? I have the Chicco Key Fit 30 (for up to 30lbs) and my 20 month old daughter is only 20lbs and she still fits in it pretty well except for slightly crunched up legs since I still have her rear facing. I have heard that keeping children rear facing for as long as possible is safest but I’m wondering how long most people are really keeping their kids rear facing?