I've noticed over the years that those abstractions have moved up a step too. E.g. we used to code our own user auth with OSS, now we use cognito.

At some point it'll become impossible to build stuff off platform because it'll have to integrate to stuff on platform to be viable. Your startup might theoretically be able to run on 3 servers but your customers' first question will be "does it connect to googazure WS?" and googazure WS is gonna be like "you wanna connect to your customers' systems? Pay us. A lot.".

There goes your profit margins.

Then, if your startup is really good googazure WS will clone it.

There goes your company.