What's your opinion on the slack in this 318 timing chain?

I was thinking that chain when spinning in the proper direction the slack is on the left side or back side like when you measure it shouldn't effect much at all its sorta like the drive/coast side of rear gears one side id driving the other side isn't in the chain it when the chain stretches so bad that the timing loss is on the drive side that you'd be concerned like the correlation between the cam and crank gear actually changes that is the significance of the 1/2 inch measurement being the no go point I'm thinking. I tend to ioverthink but the engineers knew what they were doing with their specs etc. LOL!