You do have the choice of FI so nobody has to fly with a carb anymore. I wouldn't if you paid me for it.
The new Skycatcher has a carb and carb heat. Don't think there's a FI option. This is on an aircraft that hasn't even been released yet - the newest of the new!
FADEC is fairly complex, requires sensors, electronics which have a poor history of reliability in GA (largely because there are very few competent electronics people in GA) and it would not deliver more MPG in cruise than a correctly leaned engine.
My dinosaur Aero Commander from 1953 has an autolean function - you never touch the mixtures as it leans itself by barometric pressure. This is 60 years ago and they still want me to believe it can't be done in this day and age electronically? They're just cheap and complacent, as simple as that.