That doesn't change the situation. Right now, writing applications is harder to get right, because the basic storage mechanism is a filesystem that forces a hie

That doesn't change the situation. Right now, writing applications is harder to get right, because the basic storage mechanism is a filesystem that forces a hierarchy upon you and provides only the most rudimentary safety guarantees (no ACID, no snapshots, etc.). It happens that Solaris, FreeBSD, OSX, and windows (yes, windows) have taken a good, strong step forward to address this issue. Unfortunately, linux is behind. I say that mainly to show priorities -- one would think that any feature that fundamentally makes applications easier to write would be the top priority of an OS.