Not true. The lock-in risk is the flow you get used to with Obsidian. If Obsidian disappears, I'm left with a bunch of MD files... so that's just like my file system, and if I needed just a file system to begin with, I wouldn't use Obsidian
This is an example of why I don't think we're getting anywhere near an age of abundance with AI: we're using the power we've gained in a reductive way.
Assuming this, I see even LESS of a reason NOT to have a wide array of open versions we can all hack our way from. We'll collectively have to invest less if we have an open base to work from. Reinventing the wheel doesn't stop being reinventing the wheel because an LLM did it.
In case anyone has a fuzzy memory, back during peak NFT hype grifters would take art made by other artists and attempt to tokenize it as NFTs without the consent of the original artist, or otherwise possibly copy said artist's work and make a collection of it.
It was disgusting and parasitic then and it's disgusting and parasitic now.