Thus there's no ambiguity. kB is power of 10 and KB is clearly not kelvin bytes therefore it's power of two. Doesn't quite fit the SI worldview but I don't see that as a problem.

I often see it with "kB" too, so the proposed (ugly) hack doesn't really solve the problem.

I think the author had it just right. There's a lot of inertia, but the traditional way can cause confusion.

This only works with kilobytes, not megabytes and gigabytes.