I'd just like to point out that a lot of people are making some weird assumptions here. You guys are assuming that Tera types change the actual Pokemon's typing, that is to say they add strengths AND weaknesses. That the Pokemon either becomes tri typed on mono typed by the addition of it's Tera Type. But nothing released thus far has said anything about that. It just says it adds an additional stab on top of the original.
So what if the typing doesn't change at all? What if it doesn't gain the advantages and weaknesses of that type? What if it literally just gets the stab bonus and nothing else? Makes sense as a method to remove concepts like
>>51103787 from working, right?