[xen0]

The main turnoff for me was the possibility of data corruption bricking the entire dataset.

A glib high level overview of my last job for 6 years was "write out HDF5 files". In that time, I don't recall seeing a true data corruption problem with HDF5.

Now, I ran into many other problems with HDF5, typically surrounding the newer features that came along in 1.10, and its threading limitations. The older folks at that job would mention historical issues with data corruption (often from reading files as they're being written to), but I never saw it myself.