Maaate! "wringing the neck out of my machine," It would seem you are inferring that a faster aircraft (on the same power/fuel consumption) must be being operated in a manner that will result in reduced engine service life.
You a willfully ignoring the fact that the efficiency of a given airframe, is pretty much dictated by its accumulated drag.
Reduce drag and you may go faster, for the same energy consumed or the same air speed, for less energy consumed.
There is no suggestion that anyone is"wringing the neck out of (anyones) machine," - this is emotive nonsense.
I cruise my Sonex at 5000-5300 rpm. Once in a blue moon I may do a beach/strip run at WOT (5450 rpm in my aircraft) All rpm are within Max continues.
"Fuel consumption, I care little for. I am not worried about burning a new extra litres per hour." You probably own a Rolls Royce, bully for you! In my World fuel consumption is an important factor in selecting a suitable aircraft for my purpose.
"For me, it's about enjoying my flying without counting the minutes." Skary statement! If this be the case, you should be very concerned with fuel consumption per hour, as this equates to minutes in the air, otherwise known as endurance. Me thinks your approach to flying, places you in danger of fuel exhaustion and the potentially unpleasant consequences thereof. 😈