[fweimer]

Except … for spewing out fortune responses, most of your cost by far will be in bandwidth charges. Those won't change with the implementation language. If anything, the C++ version will just be able to burn your dollars faster.

(Yes, I know, it's just a silly example, but compute costs are only one aspect, and the bandwidth pricing in the on-brand public cloud actually tilts overall costs towards being bandwidth-dominated for many applications.)