¡I love the interrobang! But I feel like we need more than just that. ⸘Would it not be fantastic to know the tone of a sentence from the beginning‽

Also, I believe what OP is looking for is something like this image. Sadly, I can't find a keyboard with them, or a copy/pastable line where they've been typed.

Would also be useful mixed with the interrobang. The backwards question mark "⸮" is also often used for rhetorical questions. But it's sometimes replaced with ❓because it's easier to type on a phone. ❗Is sometimes used for sarcastic enthusiasm, too, instead of the "official" sarcmark with is apparently copywrited and difficult to parse because it's all swirly and weird, whereas the big red ❗ or ❓ is way more obviously out of place and meant to be noticed, like sarcasm or a rhetorical question.

I always enjoy a good interrobang before bed

We're both talking about the same thing right?

I've thought the same thing many times. I love interrobang (not least of which for it's kickass name), but the same sentiment can be expressed in other ways. Dialogue can convey the others, but if you want to recreate the way humans actually speak English, you need a mid sentence punctuation, like a comma, that can express questioning. Even in speech, we change our intonation to be higher when questioning, and we do that sometimes in the middle of a sentence. It's just not conveyable perfectly with our current set of symbols.

So, for the record, these things come into existence in the first place simply because someone, somewhere, starts using them. Language is something that drifts over time, and punctuation is no exception.

Why does this not exist;? Something so damned simple!

You don't really need to link these clauses together, it sounds clunky. A question should probably be independent the vast majority of the time, and when it isn't it should come last.

Like this: Something so damned simple; why does it not exist? I think it sounds way better and is easier to read. If you need to describe the tone, that could be a sentence that comes before or after. It's easier to do this in dialogue than in thoughts, but still doable either way.

I think what you're proposing is unnecessary when you could just rewrite it to flow better. I can guarantee you that there's probably a better way to structure your sentence than simply inserting a new form of punctuation.

🕺

That's when you underline.

Switch from block letters to cursive, or vice versa. Or all capitals. Anything that shows a difference.