[ethbr1]

I think the question people are really interested in is usually "What percentage over my costs would I pay to outsource X?" (where X is some component of the complexity stack)

Which, first order approximated, is a function of (1) how big a company you are (aka "Can you even afford to hire two people to just do X?") and (2) how competitive the market is for X.

Colo and dedicated VMs are so reasonably priced because it's a standardized, highly-competive market.

Similarly, certain managed cloud services are ridiculously expensive because they have a locked-in customer base.

Which would suggest outsourcing components that have maximum vendor competition and standardization, as they're going to be offered at the lowest margin.