What lead you to choose that over say obsidian, notion, Joplin, and the many others that pretty much do the same thing?

I switched from Obsidian to Logseq because Logseq has better block-level support, better embedded image previews, and more functionality out of the box without having to rely on plugins

Why not Notion or Joplin? I like Logseq's outline format better than Joplin's long-form note taking format, and I just don't like Notion at all for purely subjective reasons.

Orgmode is more than just a note keeping tool, it is a complete and complex toolbox. I can use tables like a spreadsheet, include source code snippets, etc.

Joplin is fine, especially for shared note keeping. We store its notes on a private WebDAV server and everyone in the family can access these notes from their laptops or mobile devices.

But the editing capabilities of Joplin are dismal. Try to swap lines (on a smartphone, no mouse), change the same term in a number of notes, or do some more complex editing operations. These are easily done in emacs/orgmode, even on a smartphone or tablet ... ,at least with emacs running in Termux under Android.

They do not do the same thing.

Logseq is an outliner (though it does have a document mode), which means a deep interaction with the document‘s hierarchy: You can zoom into blocks, collapse them (not ephemerally, it’s saved in the document) and link to them.

I’d probably use Obsidian if it had those features (since Logseq is still as buggy as it was years ago), but the last time I checked it did not.