The reason is the lack of documentation from Apple.
replyReverse engineering needs a lot of time and hard work, which may not be worthwhile.
Sometimes someone does this work, and everyone may benefit from it, but you should never count on this happening, unless you do the work yourself.
Reverse engineered documentation is very often preferable to the internal kind, which is not necessarily accurate. So either way, the Asahi folks are doing valuable work.
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