One of the machines that we had at a cemetery had the flat free tires that were made up of old tires and radially assembled, they were like using a concrete roller.
Not sure how hard the current flat free tires ride, but must be harder than a pneumatic tire.
Having been an aircraft mech for many years, I have a different mindset about tires, just one of those things that get into ones head!!!
I was also part owner of a trucking company and tires were a frequent problem mostly due to lack of checking the pressures, but also due to several careless drivers. Today is the 1st anniversary of my business partners passing. We had shut down the company some years ago when his health started to decline and the costs of operating a trucking company started increasing dramatically.
As for my mowing, I'm down to about 2 1/2 days a week, getting to old for this stuff. Still doing machine maintenance for a few operators, but this has also slowed down.