> And while AI watermarking and fingerprinting is real, using typographically-correct Unicode instead of base ASCII isn't really it (though I guess anything that transforms text in a way which reduces variety like this does will make some of it less effective.)
I disagree. Your "writing signature" changes when you go from never using proper typography to suddenly using it perfectly. If you don't typically follow typography rules, LLM-generated text can make your writing inconsistent and detectable-especially in notes, where some parts follow your natural style while others suddenly have perfect punctuation (e.g., now you need to search for both your usual punctuation and the LLM's version to find something). Also, if you use an LLM to help rewrite a sentence within a longer piece, the output might include typographic details (like curly quotes or en-dashes) that don't match the rest of your writing.