Replying to Help with Edges

alright so i have a pair of anthems and i used them since like decemeber of last year and for mmy summer setup this year until the edges started to come off.. i know this isin't good but im looking for some more information about edges.. currently i have one sidewall edge pretty much gone on the ski that i slide rails regular with.. how much edge should come off before i should get another ski? is it THAT big a deal to go with no edges?