They've deeply weakened .net as it was always second fiddle - now there are more specific/relevant second fiddles to choose from.
Good .com's are worth much, much more now (e.g. Voice.com sold for $30 million USD recently).
I think some of the shady behavior from the new extension registries (they seem to hold back every decent name as a "premium") really hurt their adoption.
Maybe in the past things were different (although many studies into this tend to have ulterior motives), but I would say that Veganism has gone from an obscure lifestyle/diet to the acceptable mainstream very rapidly - e.g. U.S's population has gone from 1% vegan to around 6% in just the last couple of years (https://www.forbes.com/sites/janetforgrieve/2018/11/02/pictu...).
Even KFC are creating a vegan option.. sometimes change happens quick. I see it becoming more and more normalised.
Not so much about something already existing, but knowing how next-to-impossible it'll be to compete against the Googles/Microsofts of the world once the idea starts to take up steam/get noticed.