it was covered a while back but I'll try to put it in a nutshell.
- detrimental to the ecosystem as a whole in the long run
- detrimental to performance for some reason over time
- still didn't work that well, also been done by BB10 and look what happened.
- speculation, but lack of Play Services is a serious handicap, so still no Snapchat or Yik Yak anyway.
it appears to have been at the least, suspended. at the most, canceled and buried.