I think validation is already much easier using LLMs. Arguably this is one of the best use cases for coding LLMs right now: you can get claude to throw together a working demo of whatever wild idea you have without needing to write any code or write a spec. You don't even need to be a developer.

I don't know about you, but I'd much rather be shown a demo made by our end users (with claude) than get sent a 100 page spec. Especially since most specs - if you build to them - don't solve anyone's real problems.

Demo, don't memo.