You can scale to any valuation with any architecture. Whether or not you need sophisticated scaling solutions depends on the characteristics of your product, mostly how pure of a software play it is. Pure software means you will run into scaling challenges quicker, since likely part of your value add is in fact managing the complexity of scaling.

If you are running a marketplace app and collect fees you're going to be able go much further on simpler architectures than if you're trying to generate 10,000 AI images per second.