Comment by ActorNightly

To piggyback on this, at enterprise level in modern age, the question is really not about "how are we going to serve all these users", it comes down to the fact that investors believe that eventually they will see a return on investment, and then pay whatever is needed to get the infra.

Even if you didn't have optimizations involved in terms of job scheduling, they would just build as many warehouses as necessary filled with as many racks as necessary to serve the required user base.