Why strain? On big-big the chain is still rather loose as I can put my finger down and it bends easily. The newer drivetrains the mech can look much more strangled than seen in those pics. I have seen them almost horizontal in big cog sometimes.That poor mech...the amount of strain that's going on there. This also confirms a bent mech hanger.
... and the jockey cage is mangled as well by the looks