Originally Posted by alanbikehouston
There is a difference between "can" and "should". The chainline that has the least friction, and produces the least wear is a straight chainline. The notion that someone is going to be using every cog on their cassette from the middle chain ring might help sell replacement cassettes, but is not the best way to ride a bike.
Well, I have 3500 miles on my chain and it is fine, checked by a Park chain tool. The cassette is fine too. No, I don't ride all day in the more extreme chainlines, but it does not cause significant wear to use your gears in the manner that they were designed for.