Sure you can manipulate ally tubing to have a degree of compliance or spring to it, but I really wouldn’t want to treat such a frame the way a 456Ti can be treated, and expect it to have an extended lifespan. There is a damn good reason why forks and shocks don’t have alloy springs to save weight, but they do have Ti ones. I love the way my steel Inbred’s ride, and, although my 567 ‘bred is significantly heavier than the Hummer that most of the bits attached to it came from, and with 160mm Nixons on that’s to be expected, but the way it rides has similar qualities, as does my 853 SS. My old Cannondale hardtail by comparison felt rather dead, and absolutely hammered my ar$e. Kleins were notorious for this, whereas Ti and steel just absorb the vibrations. Carbon, too. Sure it can be read as marketing bull, especially by people who have only ever ridden alloy bikes, but until you’ve ridden all three, and then attempted to try to describe the difference in feel, then you’ll realize how difficult that is without using the same terms.