It is perfectly reasonable to be skeptical for all the reasons you've noted. However, I see two things that have changed. Most importantly, he has set of specif

It is perfectly reasonable to be skeptical for all the reasons you've noted. However, I see two things that have changed. Most importantly, he has set of specific month and year. He is also stating a specific license, which I don't recall him doing before. Finally, he did release inform 6 as open source years ago. So again, you have reason to be skeptical. But there are also reasons to hope.