I am the Kat that Walks By Itself

It's possible to use your cloth stash to line things, e.g., bags, scratchy hats -- but I don't know enough about sewing to say whether that would be better (because it's smaller compared to a full-sewing project?) or fiddlier (because it's smaller compared to a full-sewing project!).

I'm not sure either! Presumably lining bags would require a cylindrical or rectangular pattern, depending on the shape of the bag in question. I'm not sure how to make such a pattern, though. So it would be fiddlier not because it was smaller, but because it's more difficult because I'd have to devise a new pattern for each new bag.

I love how, once you've started, you can drop them into a bag and then pick them up again any time, without having to set up tools, etc.

Exactly!
Though my fluffy wrap is getting a bit big to shove into a bag. It's living on the sofa at the moment, ready to take up the next time I'm watching a video.