I use nextcloud notes. They are .md and work wonderfully imo. You can either edit them through nc or through the editor on linux (or vs code on windows). Tried obsidian, never got into it and its not open source.
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Doesn't allow moving sections around inside a note.
Iβm not sure I understand what you mean. If I wanted to move a section I would cut and paste it. What alternative donβt I know about?
You can drag the sections anywhere on the page, beside another one, above to the right, etc. So you can write some text, make a table and place that to the right of the text. Or place an image anywhere.
Cut and paste only works in a linear fashion, up or down.
Notesnook
Go for the pain tier (even though it's FOSS) 100% worth it.
Think I might skip the pain tier π
Not FOSS but I see so many YouTubers that DM talk about Obsidian for notes. I use it and love it myself, just not for DnD stuff.
Logseq and Joplin are FOSS and are often brought up. Joplins android app is garbage, if that matters to you.
Acreom isn't FOSS yet, but it's on the roadmap and I liked that one.
Notesnook is FOSS but has some features behind a paywall that might be deal breakers for some folks.