[Fission]

That’s because your data is stored locally, so special characters in the title = special characters in the filename, which isn’t possible. Small but very worthwhile tradeoff.

[Spivak]

Sure it is, what is this Windows? Put emojis in your file names, it’s fun.

[rs_rs_rs_rs_rs]

How is this a small tradeoff? You don't use punctuation signs when writing(even if it's just a title)?