It seems like the Collections feature of Observable is still a bit of a special case: From what I can tell, only the side admins can create or edit collections.
First question: Is there a plan to at some point have user created/user editable collections?
Second question: If the collections are to stay a special feature, how big do you intend to let them grow?
Third question: If we encounter (or make) a notebook that seems relevant to some collection (e.g. Techniques or Explorables) what is the protocol for nominating it to be added? Is there some expected content/quality standard (possibly different between different collections)? Is there any kind of review process? (Code review is generally pretty helpful, but I’m not sure what a code review workflow looks like for observable notebooks.)
As a concrete example, I’ve been fiddling with an explorable showing the relationship between a Bézier segment and its arclength and explaining the code therein.
It’s quite possible that this particular notebook is not aimed at a general enough audience to match the collection, or should have various features added before inclusion. It’s mostly an example to start discussion here.
As another concrete example, I’d nominate @fil’s notebook for the Maps collection (though I’d suggest he might want to pick a different color than orange). Among other things it’s a nice demonstration of ideas bouncing back and forth between members of the community.
And I can’t believe @jashkenas’s inputs notebook isn’t yet part of the Techniques collection: