That doesn't disprove anything for me. It just says POSIX DOS lowest common denominator network effects are a hell of a drug.
Whenever we're talking about interfaces, coordination success or failure is the name of the game.
What problem do you think a DB-as-filesystem solves? The only obvious one that makes any sense at all is cross-file transactions.
The filesystem is a bad database
Directories are a shitty underpowered way to organize data?
No good transactions
Conflation of different needs such as atomic replace vs log-structured
I would like to use a better database instead.
Would you pay 50x performance decrease?