Building got faster. Finding real demand still feels like the slow part.

The more I work on small software products, the more I think the bottleneck shifted. Building is faster now. Prototyping is faster. Shipping is faster. A solo founder can get surprisingly far in very little time. What still feels slow is figuring out where real demand already exists. Not polite feedback. Not vanity traffic. I mean people actively describing a problem, comparing options, or already looking for a fix. That part still feels much more manual than most people admit. Curious if others here feel the same. Is building still the hard part for you, or is demand discovery now the bigger bottleneck?