[knolax]

From the article it seems that Zawgyi rendered various Unicode codepoints (some of them reserved for the Burmese script and others from other scripts) in the order they appeared graphically. Although Burmese usually puts the vowel in the front of a consonant-vowel cluster, Unicode probably has it so that the codepoint corresponding to the vowel is encoded after the codepoint for the consonant. They're migrating by using a font that renders based on the Unicode order and keyboards that type in that order.

That's just what I got from the article and I have no other knowledge of the Burmese script so I may be wrong.