They added an update:

Editor’s note: This editorial was written prior to an announcement from Andrew Levine, Steemit Head of Communications, who said, in part:
”[…] there are no hard or immediate plans with respect to the Steem blockchain and the migration of Steem applications to the Tron blockchain.”
Levine blamed the confusion on the fact that his team had not yet fully planned announcements with the Tron team. The following article can still be read in context, with the understanding that it’s fully possible for Steemit to abandon the Steem blockchain in the future.