[uberchet]

Sure, they have a work-alike, but the original comment seemed to suggest that this sort of thing should just be built in at an OS level without a "product" or add-in being required to support it. I think, but can't quite articulate why, that building a competitor to Dropbox (which both Apple and MSFT have done) isn't quite the same thing.

Obviously your experience is your own, but I have yet to have a Dropbox sharing event fail for reasons other than user error (typically by unsophisticated relatives or coworkers, so I'm not suggesting at all that this was the root of your problem).

We should probably both be cautious of overgeneralizing from our own experiences with Dropbox, but the general presence of "it's easy and it works" even among the nontechnical suggests that your experience is atypical for some reason. Did you ever figure out the cause?