i don't think yammiis the only one doing this,i saw on a dealer website,jacos marine, back some time ago,a year or longer maybe,mercury was no longer designating a model year for their motors..don't seem like it has hurt them.with all the new motors having computer read out from them any info will be available on that.i don't see any major changes in a dfi motor from here out,software upgrade,part upgrade maybe..