I wouldn’t worry about the loss of handwriting no more than the loss of manual fiber processing, traditional farming, quilt making, etc. Even nowadays calligraphy is a craft similar to the others, and I foresee basic handwriting joining it as a novelty. To those who study and practice these “forgotten” crafts, it will still have value, just as someone may value a cashmere sweater versus an acrylic one.
Simply put, we communicate much better via digital means, perhaps in part due to not having to decipher each other’s variances in writing style. It is well worth the loss of individual handwriting style for the gains in comprehension.
Who knows, maybe the popularity of handwriting will come back once the web standards exist for (and the website supports the feature of) having your own custom font follow you around.