My personal belief is that if you need a typeface for a graphic arts project, you should not rely on fonts that may be, previously were, or could be available via an on-line service being available when you need them. License them, install them, and most importantly, keep backup copies of the fonts (and the licenses/receipts that you receive when you license the fonts). The same is true for any other digital asset necessary for your projects, whether those be clip art, stock images, ICC color profiles, and/or Pantone swatch books.