I am not really a Ford fan, but I highly doubt the 3.5 ecoboost gasser will be phased out anytime soon. Ford just totally clean slate redesigned the 3.5 eco in 2017 so much so that it shares very little in common with the 1st generation 3.5 eco other than the 3.5 liter displacement size. If they were thinking about phasing it out they would have likely kept the previous version of it around 2 more years more instead of totally redoing it. More articles and rumors about Ford eventually dropping the V8 gasser in trucks than anything else. I think that is more likely than dropping the 3.5 eco IMOP and also think that it would be a mistake by Ford to ever drop the V8,