User blog comment:Kirkburn/Technical Update: May 13, 2014/@comment-5028213-20140514223002/@comment-452-20140515170626

That sounds like a very useful feature. I've wanted something like that for some time, and would definitely add TemplateData information to all templates.

It don't think enabling it creates extra work, as it's up to individuals whether they want to add the data to each template. It doesn't appear to be any problem if the information isn't filled out.

Not having it enabled currently creates extra work when users add bogus fields to templates, or add unsupported values to boolean fields due to the lack of a visible description.