Please, I don’t want to be rude, so don’t take me wrong.
I think that’s not accurate. Trillium is not even an outliner, let alone a block note taking app. I think you’re mixing trillium with Logseq.
My memory may be failing me, but I think trillium has been around longer than Roam Research.
And yes, it’s a great open source note taking app!
Not being open source is the great… sin for me. Note taking is an investment in the future, and betting on a closed source platform is a big no no—for me, that is.
I know the content is safe in Obsidian, since it’s just Markdown files. But the workflow? Not so much.
And I know the developers behind Obsidian have their reasons to close source it. Nothing against that. But since that’s their way, it’s not my way.