Well, that's pretty heavy then... What bikes are those out of interest?
Customisation is a big reason to go with a steel frame I think. Without the customisable options and being involved in the build process the argument is less compelling for sure.
Ferrum LV145 and a Starling Twist.
Just for reference, my medium Starling Murmur is 16kg (35lbs). That's with a coil shock, hunt wheels, tyre inserts, tough casing wtb tyres and no carbon.