> I'm mixing the two because I think developers should value their time and profit from the value they add. I want them to build viable businesses so they get wealthy from their efforts and can continue keeping useful products alive.

I think exactly the same as you, but that doesn't give me the myopic view of "either you do open source or you get rich"

> There's no value to their business to open sourcing the product. Open source risks losing customers to knock-off competitors or fragmenting their plugin ecoystem (which is a lot of Obsidians moat).

You know this because you spent a whole of two minutes thinking about it?

It'd make a different bet, that Obsidian is popular today, but if they went FOSS, they'd become ubiquitous. Probably some copy-pasted competitors would appear as quickly as they'd disappear, because they're not Team Obsidian, and obviously don't know as much as Obsidian does.

But anyways, this is all speculation, I don't know for sure what would happen either, but at least I'm humble enough to know I don't know.