How to track new developers' wants?

[captainbrosset]

Do you think there's a case where we'll want to start collecting developer signals for a feature that doesn't yet exists? I'm thinking of masonry layout as an example. Of course, it exists now, but it used to be a thing developers wanted to do long before Mozilla experimented with it in CSS Grid. What if there's a feature like this that has already received developer signals via things like CSS WG issues, surveys, or other, but which isn't yet tracked in the web-features repo?