a-staticview-conundrum.js

...
  introView: SC.StackedView.design({
    layout: { top: 20, bottom: 20 },
    childViews: [
      SC.LabelView.design(SC.StaticLayout, {
        useStaticLayout: YES,
        classNames: ['append-to-me'],
        escapeHTML: NO,
        displayValue: "So, I'm a big ol' string of text. <br><br>And I'm another string of text."
      })]
  })
...

Later...
> SC.$('.append-to-me').append("<br>If you could just go ahead there and append me this weekend, that would be great. <br> Mmm-kay?")

// Nothing is visible! The introView's inline-styled height does not change to stretch to its childView