It's not just money, having the #datacenter facilities (power, cooling, space) is also a limiter
Talking about #cloud cost, here is an interesting article by @TDaytonPM
“at 50% utilization or so measured by wall clock time, the cloud is a bad answer for sustained workloads. Even with spot and reserved instances, even with discounts.”
1/ Interesting read: @jonmasters uses the return of @PGelsinger to @intel as an excuse to talk about how the semiconductor world has changed with a small number of #cloud vendors calling the shots