Postman founder here. I did not time this with an AWS outage of this magnitude but I posted about filesystem, git, and offline support coming to Postman last week: https://x.com/a85/status/1978979495836356819?s=46
Postman has a lot of capabilities now that require the cloud but there is still an offline client built in just for requests.
Building sign-in and cloud features were not due to a VC-led conspiracy. A large number of companies depend on APIs (like AWS) and have thousands of services and APIs. Customers need to manage them and wanted us to build it.