From Phonemic Spelling to Distinctive Spelling

Whether spelling is phonemic is only one factor in whether a writing system is suitable for a given language; another consideration is "lexical distinctiveness" of spelling, in two separate senses, and the importance of lexical distinctiveness grows as a writing system matures. Seen in this light, the increasing irregularity of English spelling, over the period when English has been a written language, has been a desirable response to the changing needs of the English-speaking world.