Because reading that post it’s confusing if they are releasing a JIT or simply making BEAM runtime improvements.
I ask because a JIT was scheduled for OTP 21 as noted here https://mobile.twitter.com/FrancescoC/status/872736686006046...
This video also supports that guess: https://youtu.be/hHhm0bfdj-4?t=10m14s
This video also supports that guess: https://youtu.be/hHhm0bfdj-4?t=10m14s