I wouldn't pay big attention to bloggers and unofficial news (specially 2-years old). On mysql.com I didn't find a note about myISAM being deprecated soon. I suppose it's too early to take such news seriously, because definitely there will be a lot of users which will be against ruining myISAM. Like the author of one of the comments in above article,
How terribly depressing that the fast, small, efficient MyISAM engine is going away, forcing us to replace it with its bloated successor, InnoDB, which eats memory and disk resources and belches out complex, hard-to-manage, hard to backup, hard to restore, hard to copy, hard to move, databases.
I'd rather agree to this. There are a lot of websites build on myISAM and their structure doesn't require anything more complicated which InnoDB provides. I'm mostly sure that if there will be no more lite and free mySQL community edition which supports myISAM, then this niche will be taken by some other product. Millions of small websites simply no not need difficult database. In this case Oracle risks to lose mySQL community as it happened with postgreSQL some time ago. PostgreSQL already was similarly bloated and see where it's now - almost forgotten.
Also let's not forget that mySQL is not just the only one tool we need for forums. The primary thing is PHP and all scripts actually rely on PHP-mySQL connectors. Whatever new is invented in mySQL it should be also supported in PHP, but now guess how many servers still support PHP 5.x because in PHP 7.x many functions were abandoned and that made older websites freezed? There are a lot
of such servers. People just start dislike critical changes happening too often, preferring to stay with something stable.
So I doubt Oracle will abandon myISAM easily :) it will kill the primary goal of mySQL project. Then mostly everyone will just switch to another database.