[tomjen3]

As students we learn of the cpu/memory tradeof. In the real world it is engineering time/cpu/memory that is involved in the tradeof. Given how much money we make the business case often doesn't come close to existing for moving the tradeof to CPU time. Take Slack - they are adding tons of new users and their users love them, the company has a high valuation. Focusing on getting that percentage down to nothing would have torpedoed their company.