I'm a huge advocate for making everything open source so good for 4coder! I feel like a couple of posts on HN the past few months have been "X is going open so

I'm a huge advocate for making everything open source so good for 4coder! I feel like a couple of posts on HN the past few months have been "X is going open source". It makes me question why projects that aren't open source when they initially release switch over to open source later. I understand keeping a repo private before having a working/stable product, but why release a product as closed source and then open it up later? Why not just keep the product off the market until it is ready to be released and make it open source before or at launch time? I totally have space that I'm just crazy but as someone who tries to keep my stack as open source as possible I find myself not really interested in products that start closed source and eventually open up. Is it just me? Just to reiterate: I'd rather a project go open source later vs never. EDIT: I just realized the context for 4Coder was that it was a "we're ending this product so here's the source for anyone who wants it" -- I am super grateful for closed-source products that do this. But my question is still relevant for other projects that have done what I described above.