[pm90]

I don't think moving cloud providers is an effective way to solve for cost problems; especially considering the engineering cost involved in making these migrations, which reduce the marginal utility of such a migration to 0, possibly even <0.

If you're really looking to save on costs, hosting solutions (i.e. hosting racks or some managed solution) are probably what you would need to look at. But then there are other costs involved there as well (infrastructure team, upfront capex costs etc.), but it might still be worth it if you run e.g. a ton of batch processing over a ton of data.