>There's very few occasions when autocomplete being disabled makes sense

True, perhaps. The point is that's not for Google to decide. In their example with CRM system, it's very possible that the developer did think about it, and decided that autocompletion would "help" the user enter wrong data.

Now Chrome forces you to be non-compliant to work-around to their "custom feature".

Chrome is increasingly encouraging developer behaviour that's reminiscent of Microsoft and Internet Explorer 6.