I like the idea of Notion, but one of things keeping me is that it seems like it'd be a pain to export one's data if Notion ever went out of business.

But just keeping folders of Markdown notes is also inflexible, but on the opposite side of the scale.

Obsidian looks like a great balance! I've requested beta access as well.

Edit: Obsidian seems to make it easy to create a Zettelkasten, sort of like https://github.com/alefore/weblog/blob/master/zettelkasten.m... but with automation baked in.