Still, something like CSS removal, spezgiving, or Pao happening again could easily trigger a migration. Voat didn't take off simply because it couldn't handle the load when those events occurred.
Reddit has been through a lot. (I went through three CEOs during my 3-year tenure there.) At this point, I can't imagine a scandal worse than spezgiving- the only way Reddit will die is a slow fade into irrelevance, rather than a Digg-style calamity- and I certainly hope not, as a Reddit addict.
Also, I have a theory that the "no more css" and "okay some css" was a carefully crafted maneuver, rather than a real backtrack.
Still, something like CSS removal, spezgiving, or Pao happening again could easily trigger a migration. Voat didn't take off simply because it couldn't handle the load when those events occurred.