I never got this other than that it takes longer for it to rotate...
makes senseThe heavier the chain, the more inertia it has, meaning it will require more power just to move the chain, let alone the rest of the bike. It's also a rotating mass, which will have an effect on handling. The heavier the chain, the slower the bike will want to turn. However, the trade off is that a heavier chain will last longer than a lighter chain.