Replying to When should I worry about base damage?

I had a rough day at the hill and couldn't stay away from the rocks. I have some minor edge damage underfoot and several long (7+ inch) shallow scratches/gouges that travel down the skis. No core shots, just scuffed up the outer layer of the bases.

I'm just curious when people should start worrying about scratches and the effects on performance. I know core shots should be addressed immediately, but can the shallow scratches and scuff marks cause a loss of performance?

Kind of a dumb question, but I just want to know in what situation a base grind is necessary, or when p-tex should be used. Thanks in advance.