I'm sure all of you have noticed that California Screamin' is launched by LIMs and uses a LSM array for its lift hill. You can tell the difference in the fact that Screamin' doesn't have to break before catching the chain (as Thunder Mountain does... three times), and the low whine sound they make when going up the hill.
This decreases maintainence costs from using a chain, as the LSMs seem to be more reliable in the long run. They also eliminate the need for braking before a lift hill, and the chain runover seen in Thunder Mountain, making the rides more fluid, especially in Thunder's case.
As for the Matterhorn, couldn't the rubber tires be replaced with LSM or LIM technology? It worked on People Mover, so wouldn't it work now?
The downside is that it would be a larger initial investment than a chain lift system. But wouldn't the show and maintainence benefits outweigh those costs?
So what do you think about moving all the Mountains to a chainless lift system, relying instead on LSMs?