Product Post Mortems (app graveyard)

Hi. Many times I'll come across what I think is a fantastic product on here only to learn that they are already dead and gone. I wish we could have a section on here where we can do post mortems and analysis of what happened to certain products. Did they get acquired and sunsetted like Google, Facebook, Apple and Microsoft all love to do? Did they run out of runway? I think it would be educational and fun to have such a place on here. The founders could share their side of things too.