@JDM told great history of skiing at our public lake. I want to add that in more recent years there has been an increase in "ski" type boats here but outside of our small group there are very few that are actually interested in putting the time in to learn to ski the course. Towed sports are growing but not slalom. The majority here prefer to tube, surf and wakeboard (in that order!). With the increased traffic and the small daily window of potentially skiable water, it is nearly impossible to get any any quality time in the course. Even on a Monday or Tuesday, with only a handful of boats on the entire lake, it only takes one boat in the vicinity to end your set. There's kind of a luck faster involved. The result for me, at least, is that I don't even pretend to take it seriously anymore. In fact, I am no longer the organizer of our club and haven't even been in the course yet this summer.
For others that mentioned the public lake vibe of fun and comradery is great for the sport, I couldn't agree more! That's what we had back in @JDM 's day and it was truly fun. If you have access to decent conditions, slalom can grow on a public lake. If you can achieve this on a wide scale the competitive aspect of the sport will naturally grow too.