With my older child she rear faced exclusively till she was 19 months then she did about 25% of her time forward facing. Around 3.5 we put her forward facing in both vehicles. My younger child started having about the same percentage of forward facing time starting right around 24 months and she isn't going to be forward facing for more time for a long time.
I have them forward face in my husband's car on road trips because that way I can hand them things and interact and get through the experience without completely freaking out. My kids like to scream while rear facing. I deal with that in my van most of the time because the screaming is far enough away from my head that I can handle it. When we are in the smaller vehicle I can't handle it. I get horrible headaches that make it so I can barely see. I have cracked teeth gritting my jaw trying to have enough self control to not beat the ever loving tar out of my kids. I just can't handle being stuck in a small enclosed space with that much screaming. I can't handle it.
I am well aware that in the opinions of some of the folks here that means I don't care enough about my kids but I think going through childhood without ever having mom lose it and beat the children is worth the risk. I understand that it would be preferable if I had more self control but I don't. I have what I have. Am I taking a risk? Yes. All of life is a risk. If I didn't want to take any risks I never should have had kids and I should definitely never leave my house.
Yes, it is an increased risk. I know that. But the risk of me beating my children is much more certain and immediate. I don't want to beat my children. I have limited self control. I'm sorry for that. I just can't handle that much screaming.