The problem with fallback corrections is that you don’t know certainly what the fallback will be, and still further, it will not be the same across all platforms, which is an absolute killer of the concept.
Further, I suggest that in most cases you even shouldn’t know what the fallback will be—that most of the time I really, really wish people would fall straight back to a generic family. I’m tired of `font-family: Some Fancy Sans, Helvetica Neueueue, Helvetica, Liberation Sans, Arial, Droid Sans, sans-serif` and the likes. Mostly you should just go with `font-family: Some Fancy Sans, sans-serif`, and revel in not knowing what the fallback font actually is, because you’re following the user’s preference (well, for the small fraction of users that have expressed a preference, anyway; but we’ll probably appreciate it).
Further, I suggest that in most cases you even shouldn’t know what the fallback will be—that most of the time I really, really wish people would fall straight back to a generic family. I’m tired of `font-family: Some Fancy Sans, Helvetica Neueueue, Helvetica, Liberation Sans, Arial, Droid Sans, sans-serif` and the likes. Mostly you should just go with `font-family: Some Fancy Sans, sans-serif`, and revel in not knowing what the fallback font actually is, because you’re following the user’s preference (well, for the small fraction of users that have expressed a preference, anyway; but we’ll probably appreciate it).