I know of three track types available for machines. I'd surmise there is really more than just three but they all are made for different conditions. My buddy who runs bully's on beats said that aluminum cleats were the best at that job. So we really need to say which type of cleats is used when speaking of some machine. Our trail bully cleats were 40" wide and made to be ran on the road.
For blade wear edges, seems the builders have figure out that many people run them against the ground or road so they've been made stronger and tougher over the years from doing that. If you look at machines built X years ago, the blades were much, much lighter. While doing sled trails with PB 400's, I was trained to run the blade across the road and clean the snow off the road. It sure growled on asphalt! The blades hardened edges would show serious wear after about 4000 hours. These edges are welded on and we replaced them over time.