I put Eternabond tape on my Bullet Premier when it was new in '13. No issues at all. The other sounds like a marketing gimmick to me.
I will add that you need to be careful with the factory warranty as mentioned. It would only void warranty if it was proven that the Tape caused the issue which would be rare, but if you do have a roof issue where the tape would need to be removed, you would be on the hook.
I taped the caulk joint between the roof membrane and the front and rear caps the first week I bought it. Shortly after, I received a recall notice that the front cap may not have enough screws securing it along the roof seam. There is no way the tape was coming back off so the recall work was never done.