Yeah, I grew up with skis, but I don't think I have ever heard of anyone sharpening the edges. Waxing the skis yes.
You really do notice the difference on well maintained edges. On groomed slopes I can ski anything, and it doesn't really matter. But I don't think most people realize how icy a race track can become.
And no, no kids. But if I do, I'm thinking I'd like them to do something not as expensive and time consuming. But with my own 50 days skiing this winter, it might just end up being skiing anyways, heh.