Auth0's business model is a race to zero. Microsoft, Google, Salesforce, Oracle and others (for example Okta, Onelogin in the startup arena) are going to force their prices down to practically nothing. The per user pricing model in the identity space is loved by insipid venture capitalists who like simple "back of the envelope" math, but customers hate it. You are penalizing customers for using your service--rewarding them for putting as few users as possible in the system. Also, there is no one-size fits all value for users--some users are more valuable then others (for example, an employee versus a one-time ecommerce customer who buys a t-shirt). So you end up trying to price users differently, which undermines your value story. What's more likely to happen is that open standards will increase competition and centralized service providers who add very little value, and are big targets for hackers, will be lucky to get out alive.
You are an absolute visionary and could be the next Steve Jobs or Elon Musk even. Please keep sharing your predictions and I can stop my 401 contributions and invest in those companies you mention and beat Warrent Buffett soon.
OK, this makes a better case than the previous post (HN discussion: https://news.ycombinator.com/item?id=13371662), as it is discussing new niches opening up rather than old/existing ones dying out.