All fair points, and yes the Domane is an awesome smooth magic carpet that has taken me 20K miles.
My N+1 search is simply to have a different type of bike to ride, something more sporty and exciting to ride, hence the race geometry.
I do have an upright position currently with a full stack of spacers, and at 50 I’m doing A group rides, not racing or getting more flexible. Have ridden other endurance bikes but really couldn’t perceive any difference from my Domane.