Dave, with the modern invention of the internet I think you will see more and more of a rift between machine cut and hand cut dovetails. Let me explain...
As others have said, machines require a certain amount of mass, remaining wood and cutterheads to perform safely. Hand cut dovetails do not. At the same time the ingenuity of man has no limits, and with the modern internet now, unmillable dovetails such as hounds teeth, micro-pins and tails, and even odd shaped dovetails like Lovetails and Pistoltails are on the web. More and morepeople are seeing these hand cut dovetails and the more they are seen,the more the machine cut dovetails look kind of stagnant, bland and crappy.
Myself the first thing I do when I open a drawers look for dovetails...then I look for the tell-tale nick of a handsaw. When I do my own dovetails, I strive to keep that nick to only one spot...but I leave at least one so that there no question they were cut by hand!!
I have no intention of traveling from birth to the grave in a manicured and well preserved body; but rather I will skid in sideways, totally beat up, completely worn out, utterly exhausted and jump off my tractor and loudly yell, "Wow, this is what it took to feed a nation!"