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AWS or not, investors invest for the sole purpose of spending money with the hope of finding a unicorn. If an investor just wants to sit on their money, they can do that without giving it to a company.

Then those investors are stupid. Hope is not a strategy. But more likely is this take is wrong. Also sounds to me like GP maybe missed another consideration: architecting your application in such a manner that scaling is straightforward (not easy, straightforward, there is a difference).

Using AWS as an example, at one of the businesses I worked at, we used Kinesis as an event bus. One shard handles 2MB/sec of output. This worked pretty well for thousands of messages a second, we even got up to the 100's of thousands by compressing the payload of the event message. After that, you can employ any number of strategies that work easily, such as shading and adding additional streams, and use a lambda to pipe the output of one stream to another. It scaled up to millions of messages by essentially pushing buttons in the AWS Console.

Take a look at your architecture. More than likely, outside of a FB/Google/Netflix traffic scenario there is probably an easier and more straightforward architecture you can use that scales to your realistic use cases. Worry about the billions when you get there, which you yourself probably wont at that point because you would have exited, or moved into a higher role most likely by now.

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