At least one thing seems to be agreed on: if MK has a matchup that's worse for him than 50/50, banning is out of the question.
Which is wrong...
If a single character still utterly controls the metagame, but one character beats that character, then MK is still bannable.
What will happen is that MK will clear the field for that character, still making the majority of the cast unviable, and then that character will actually win tournaments the majority of the time.
It'll be just like Snake before people realized that with good spacing, MK could beat Snake, to a great or lesser extent depending on how big the advantage is.
Unless that character is reliably infinited by a popular character or something, in that case it really depends.
But in all likelyhood, one counter will not change MK, he may not be the top, but he'll still be overcentralizing the metagame, just very SLIGHTLY less.
There are other characters that are similar enough to his size that it's vanishingly small a combo will be found on him that won't work on them. Same for his light weight.
Everything else is going into the realm of "incredibly unlikely" and saying he can't be banned as long as that's not been demonstrated false (An impossible thing to prove) and by that logic, Akuma shouldn't be banned. Since MK isn't even close to Akuma, we'll never be able to demonstrate to you that he's ban-worthy.
I have covered every reasonable occurance. You're having to go for the "Maybe there is a magical thing that MK will do if Bowser catches him with only one fire in the stream of fire breath while it's tipped halfway to its maximum that will stun him and drag him into the entire thing inescapably" results to have anything left, and that's just a ridiculous position to be trying to hold.
I never said it was impossible, whenever I have specifically said the chances of it being located I have said extremely unlikely (Or wording similar -- I believe in one case I forgot to include a modifier "vanishingly unlikely" and just said "won't be found" because I believe that in practice the odds of "one AT that only works against MK" existing is that unlikely). You haven't proven a thing against that, for some reason you're saying "it's possible so we should wait to ban him" disproves my "extremely unlikely and not worth waiting for to ban him"?
I'm asking you to demonstrate why it's a better chance than extremely unlikely, and you've given me nothing except high handed rhetoric and claims of your debating superiority. No evidence. You'll get no argument from me that it's possible (I agree, there could be something), but what you have yet to do is demonstrate that it's realistic for waiting for.
Then we were obviously arguing different things.
This is the statement I took issue with:
Right here. I'm not the one shifting the burden of proof, you are claiming a possibility so you must prove that possibility.
Possibility exists in a vacuum, there is never a need to prove it exists. If that wasn't what you meant, then I have a choice quote for you.
If you cannot say what you mean you can never mean what you say.
However, since I know that you are not arguing that it is impossible, I see no reason to continue this particular tangent, we are in agreement.
Now to the meat of your argument.
Understand that it's highly unlikely given character with one move, but complicated chains that just work are quite common. Chaingrabbing in general functions off that principal, think DDD's infinite on Luigi for an easy example. If one tiny insignifigant detail was off... most character specific combos would not work.
Now again, you're straw-manning my argument, I never suggested that it would be something like this that would necessarily happen, it was merely one of many possibilities.
But let me explain again why we still need at least some time.
The community is quite simply, too young. The easiest example of this is the fact that for my understanding of MK's match-ups I must work on community sentiment instead of hard data. Without reliable match-up data, we cannot be sure that MK is broken AT ALL.
Another perfect example of this is we don't have a good ban criteria. We have ambiguous terms like "overcentralization", but no list of actual attributes that has been heavily debated over, revised, and eventually been accepted that we can reference to.
Given those two facts, banning ANY CHARACTER even Akuma would be premature.
Once we have those two things, we can figure out how boarderline the character is (if at all) and from there, decide how long we can continue to wait for new discoveries (if any).
But until the data and the criteria exist, we have no way of truly knowing if MK is banworthy.
Out of curiosity, why do you maintain that there's a possibility that a tech will be found against Meta Knight, but dismiss the possibility that, if such a tech exists, it will be found in with Meta Knight banned? They're both possibilities, and without proof either way, you can't say that one is more likely than the other.
For the same reason I say that we can't wait until the metagame is "perfectly mature" and "sufficently mature" is all we should require.
The odds simply become far too small.