Since it's relevant and funny, I'll quote the famous rant of Linus Torvalds on the topic (it was because of issues it caused with Git, but I assume it still means it's unlikely Linux will ever follow this path ^^)

"The true horrors of HFS+ are not in how it’s not a great filesystem, but in how it’s actively designed to be a bad filesystem by people who thought they had good ideas.

    The case insensitivity is just a horribly bad idea, and Apple could have pushed fixing it. They didn’t. Instead, they doubled down on a bad idea, and actively extended it – very very badly – to unicode. And it’s not even UTF-8, it’s UCS2 I think.

    Ok, so NTFS did some of the same. But apple really took it to the next level with HFS+.

    There’s some excuse for case insensitivity in a legacy model (“We didn’t know better”). But people who think unicode equivalency comparisons are a good idea in a filesystem shouldn’t be allowed to play in that space. Give them some paste, and let them sit in a corner eating it. They’ll be happy, and they won’t be messing up your system.

    And then picking NFD normalization – and making it visible, and actively converting correct unicode into that absolutely horrible format, that’s just inexcusable. Even the people who think normalization is a good thing admit that NFD is a bad format, and certainly not for data exchange. It’s not even “paste-eater” quality thinking. It’s actually actively corrupting user data. By design. Christ.

    And Apple let these monkeys work on their filesystem? Seriously?"