Company politics interfered with the work on database as file system, one of Longhorn's greater ideas. I can't remember the specifics, it's on Slashdot somewhere, can't find it anymore.
> their 16-year-old search implementation
… is Giampaolo's 22-year-old implementation.
http://enwp.org/Dominic_Giampaolo https://arstechnica.com/information-technology/2018/07/the-b...