If you are looking for something similar focused on privacy but that leans more towards RoamResearch UX, you can give logseq[1] a try.

[1] https://logseq.com/

I forgot to add that logseq is open source, the file encryption feature is built-in (you can opt-in or opt-out) and all the documents are saved locally in md files.

nice! any iOS clients in the works?

It's a pile of files on your hard drive, so encryption is up to you. If you buy their sync service, you get encryption: https://obsidian.md/sync

Obsidian don't have encryption built-in, they do have the encryption via community plugin. But it is only partial (I believe per note), not the entire vault.