My A10 is cumming up 11,000 miles from rebuild with a new chain from my local bearing service, I have only adjusted it twice in that time, about half a turn each time. I have never had the chain off, to much trouble! I'm lazy! but I keep the chain well lubricate with Pentrite Chain Lube, applied after a ride when chain is worm, if needed.
I think a bit of the problem with excessive chain wear is it is keep to tight, 1 1/4" to 1 1/2" free play in the middle of the chain on the back stand is fine for the A10 SA's.