@email@example.com I have a reasonably tight integration of Obsidian and Zotero and see the lure of Readwise but prefer manual import for most parts outside of Hypothes.is. As for the Remarkable piece, if you must given their T&C, your best bets are searching https://www.obsidianroundup.org/ from @firstname.lastname@example.org or the Obsidian Discord channel for #academia. Click through for links/details.
This thread makes me wonder when the Hypothes.is team will be allowed to build a layer onto e-reader platforms? Another great idea might be for e-readers and note taking tools to have built-in micropub clients so I can use them to publish to my website or other platforms.