its also the fact that a lot of fundamental systems work in trade offs.

Do you want performance, or correctness.

Well, if you want performance you use write through caching and in the case of distributed storage: more nodes confirming the block before returning. Huge performance cost.

Outsourcing this just means someone else makes these tradeoffs, they will prioritise the general case- and they’re even more incentivised to move the needle towards things that are most visible to the end user.

In this case, performance.

You won’t notice that theres a third commit server off-site (unless that site is bombed), but you will notice slower writes- and the general case says that people will express comparative dissatisfaction with weaker performance and use it as a justification to use another provider.