1. EDNS is needless when you are using your provider DNS. It is needed for public DNS servers. So it is optional, as is needless most of the time. Before launching Cloudflare DNS, the biggest public DNS service was Googles, who developed and implemented EDNS. Then comes Cloudflare and "the people with the expertise and interest" to rethink that.
2. I assume that commercial companies are here to make money, not "a better future" (besides the better future for the shareholders).
If they implement something, the first question is how do they make money with it.