Depends on your performance tolerance. Networked IO can be an order of magnitude faster or more than a local spinning disk, but sure, network latency will likel

Depends on your performance tolerance. Networked IO can be an order of magnitude faster or more than a local spinning disk, but sure, network latency will likely never top the performance of cutting edge SSD used locally. As a case in point, I've pushed greater than 600mb/s of simultaneous heavy read and write traffic to an AWS EBS volume with acceptably low mean latency, which is more than enough for many Postgres use cases, but there's definitely cases where even that level IO would be a major bottleneck.