It was acquired by a huge company that sometimes kills products. Shortly after the acquisition, the downloads were removed from the website. It did go open source "recently" though which made it longer lasting, but I'd understand if someone would think it was dead by now.

- https://news.ycombinator.com/item?id=9259986 - Apple Acquires FoundationDB - March 24, 2015

- Comparison between March 25 and March 14, 2015 - https://web.archive.org/web/20150314231702/https://foundatio... (14th March) > https://web.archive.org/web/20150325003252/https://foundatio... (25th March)