I'm not sure I agree with you on this one... When I used to live in Vermont, we would get super warm conditions one week and then super cold the next. Waxing just isn't for really warm days, when the snow is sticky. Really cold conditions form sharp snow crystals that literally dig into your base and slow you down. Cold wax is quite hard, which you can feel simply by pressing your thumb into it. This wax helps form a protective "shield" against these sharp snow crystals allowing you to glide better.
Agreed that if you wax after every 10 days of skiing you will be doing ok, but waxing more frequently will only help keep your base running fast and also more durable. Because I am spoiled and nerdy, I wax my skis with a special base prep from the Atomic race department as often as I can (immediately after a ski day, and then during the week one or twice before my next ski day). This type of wax is similar to a warm wax in that it will at least keep the base treated and ready for the special wax of the day. I'm fairly certain I have the fastest 98mm skis on the planet ;)