The  Arch  Linux  devs  are  considering  making  i686  a  "secondary"
  architecture or even dropping it:

  https://lists.archlinux.org/pipermail/arch-dev-public/2017-January/028627.html

  I'm happy that I replaced my last i686-only box almost four years ago.

  I think this is a good thing to do. The thread  on  the  mailing  list
  made  it clear that i686 is barely tested today, which is a bad thing.
  Do or don't, but don't pretend.