I commented on traction tires late last year when this topic first got going and my attitude about them hasn't changed as yet. I like 'em! Tried running engines without their traction tires and they just don't make it. Simply not enough traction. One engine, an Atlantic, pulls seven 21" aluminum passenger cars up a 2% grade when running with the tires. Can't pull four of the same cars on the same track without them.
Again, I will mention that I only use Weaver's traction tires for replacement on any manufacturer's engine. Their tires have a cross hatch tread pattern that not only grips the rail well, but also allows the tire to move just a little bit within the tread groove on the drive wheel. This lets the tire adjust to it's starting position each time the wheel turns a revolution and prevents the tire from "bunching up" and causing first a rough ride followed by the tire generally coming off.
Yes, after some time and probably quite a number of scale miles, the tires will begin to wear out, a bit. Also, I expect that if the wheels slip and generate heat, the rubber will loos it's resilience and can come off. But, if I have to replace more than two pairs of tires (always replace them in pairs, both wheels on an axle) in a year's time I would be very surprised.
Comparing model trains to real trains isn't a valid example. The physics of model trains is different than the real trains. Furthermore, we generally have much tighter curves, stiffer grades, higher friction rates in our bearings, etc. than our full sized bretheren.
Traction tires are no problem for me. I like what they do to make my trains run better.
Paul Fischer