The Hyper-XX has really piqued my interest as well. I currently have an older Tamland which is QR front and rear, and eventually I will be looking for a lighter weight gravel frame with thru-axle compatibility. The Hyper-XX is currently at the top of my list.

As regards the weight of steel frames, I also own a Gunnar Roadie in 56cm and the frame is ~3.8 lbs. It all comes down to which frames you are comparing. A decent carbon frame and a "high end" steel frame like a Gunnar, with the cost for both being the same at ~$1200, you're really only looking at 1-2 lbs difference. Even with higher end carbon frames you're paying a lot more for a different carbon layup but not a significant weight savings.