Late to this thread. If you're still interested in data points, here's mine:
+ 7 year old vinyl liner
+ have never added calcium
+ fill water has 52 mg CaCO3/L
+ pH 7.5
+ CYA 50 ppm
+ use 12% LC and trichlor

No damage, no wrinkles, nothing adverse to report regarding the liner. Some fading from sunlight - the area covered by the steps is darker than the rest of the pool.