It’s interesting that a closed-source app has good reputation among FOSS enthusiasts. Surely they are not a Microsoft or Apple, but still who controls your computer, you or them?
It stores your data in plaintext, and simply uses the program to parse special formatting characters. There are no attempts at obfuscation or encryption, and it doesn’t lock you into a walled garden that refuses to play nice with other programs. The program itself is closed-source, but anyone could write an open source version to parse the same info… There just hasn’t been a good reason to do so. Even if Obsidian as a company and program ceases to exist overnight, your data is still safe on your machine and can be read by anyone who cares enough to dig into the file. Hell, you can even open it as the plaintext file and dig through it manually.
Now that it’s free, are its users the product?
Nothing else is changing. No account required, no ads, no tracking, no strings attached. Your data remains fully in your control, stored locally in plain text Markdown files. All features are available to you for free without limits.