I feel like we are pretty close to the limit on the time requirements for horse ownership too. Weekend warriors have to make a cost/value analysis, both for $ and time. When too few people in your life understand the value of horses, the time cost becomes even more expensive. This is how we are losing volunteers for shows, in part - I see some families out there supporting each other and the sport, and some individuals, and the culture of families supporting the interests of their loved ones makes a difference to our longevity.
I wonder if “the future” for the industry is more “horse experience” situations, like riding vacations, but for people who don’t ride. The business model would need to figure out how to attract sufficient volume of non-repeat customers. It would have to be paired with something else attractive like resort/spa/yoga/therapy or similar. Maybe some people would be able to do regular lessons, but if we don’t expose more people to the joy of horses more broadly at low levels of commitment, we will be in trouble.
Maybe the best thing the horse community can do is start actively promoting and advertising what it is that we love and value about “horse life” without anything having to do with showing. See e.g. the recent thread about what people who no longer own horses miss about it.