My good friend and colleague, canonist Ed Peters is frequently bemused by how often this issue continues to resurface. As a canon lawyer, he sees absolutely no issue here. Reposing a near-absolute trust in his judgment about canon law (concerning which I am little more than a tyro), I heartily agree with him that there is no canonical problem with the practice of Communion in the hand. As I understand the matter, it was introduced into the United States and various other countries under an indult; that is, as a canonically licit exception to the ordinary and otherwise normative practice of reception on the tongue.
Having conceded this point of agreement, I would insist that there nevertheless remain a number of other grounds on which the practice may (indeed must) be considered and evaluated other than simply that of canonical licitness, and I have little doubt that my friend (Peters) would agree. I can think of a number of such grounds that might be considered, though I do not intend to explore them here for myself -- such as theological grounds, historical grounds, symbolic grounds, moral grounds, and even grounds of sacramental and liturgical aesthetic fittingness.
In any case, having done a bit of historical digging into the origins of this controversy, I was gratified to see that Michael Voris and his staff have put together another excellent detailed documentary-length investigation into the issue, which is ordinarily available only to "premium subscribers," and not merely to viewers of the comparatively tiny, sound-bite-sized "Vortex" episodes available daily for free to the unwashed and unpaying public.
Below is a brief Vortex episode introducing the series; and just for this week only, one key episode of the series, Sleight of Hand: Reception Deception, is being made available to the public at no charge.