While it's technically not open-sourcing code itself it's human nature in my opinion. As a founder you want to support and don't upset your customers, even if t

While it's technically not open-sourcing code itself it's human nature in my opinion. As a founder you want to support and don't upset your customers, even if they are using the free version of your product. Yes, you could simply not fulfill these requests or not help these customers, but I think for most people it will still introduce stress. There may be people who can deal easily with this, but I think it's natural to be stressed by this and run after things that you shouldn't. Still I agree that it's probably possible to open-source without these problems and that this is not a complete compelling argument for every case. For me personally at least not open-sourcing at the beginning (like the author did) would probably be preferred as well for a solo-founded project.