I've been thinking about that — after all, Reddit with its concise design, is pretty nice.
I'd want there to be an optional concise theme, so Talkyard could look more like HN or Reddit, for those who prefer that.
> fold all sibling messages before the one that I'm interested in
Where could be a good place to place a Fold-all-siblings button? There is a Fold-whole-thread button already at the top of each post, to the right of the author name (it looks like: ^ and to un-fold: v ), ...
... but if one has scrolled down a bit, and want to fold all siblings, when the parent post is a bit away, then, could be impractical to have to scroll up to it, and click a button up there?
Maybe clicking the arrow could open a power user menu, with "Scroll to parent" as the default, and also a "Collapse siblings" button?
Example: If you go here: https://insightful.demo.talkyard.io/-9#post-24 and click the arrow to the left, maybe this poweruser popup menu could open?
And / or you have other ideas? :- )