[halfeatenpie]

Well it's partially the cost/benefit analysis of:

1. How much benefit will we get? 2. Will this benefit be higher than the cost of purchasing this right now? 3. What other alternatives will satisfy our needs?

For most of these solutions, the answers are:

1. A lot. We need computing power to perform these analysis faster and to be competitive. 2. Yes, as continuing to innovate in this space will keep us competitive and give our scientists the resources to remain productive. 3. AWS/GCP/Azure are alternatives sure, but then (the rate at which Meta probably uses these resources) it probably cost them less to build this out than to pay AWS/GCP/Azure for access to these hardware.