> Why do you need to have this ability to unsafe bitcast? Is interconversion 
> between point types such a common operation that it's a performance 
> bottleneck?
A real-world example: Real-time image processing.
When you have a stream of 4k pictures at 30 fps, you really don’t wont to copy 
buffers just because two filters insist on having their own representation of 
bitmap data.
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