Please add the ability to add additional rich text fields

Currently, on a task, the only multi-line rich text field allowed is the Description field. This is pretty limiting. A common pattern for software development "tasks" would be to include not only a description but also Acceptance Criteria. It would be nice to have a separate field that we could define to spell out the AC. This is only one of many examples. It might make sense to have a field for User Stories that is separate from a description or a whole host of other things. When we only have one rich text field, that field is constantly being updated, so a quick scan through task changes won't indicate that a description, story or AC were specifically changed. If the description changes, you actually have to read each change to see which part of the overloaded field changed, if you're using this field to store a bunch of data that could be stored in separate fields.