Biblically speaking the "coming of the son of man in the clouds" is not how most people tend to think of it.
People tend to see Christ coming down in the clouds BUT the analogy is from Daniel and in that He is ascending, not descending.
What Stephen saw was Christ seated in the heavens, not descending, just there.
I think that people tend to want to see "pretty " things and that is why angels are good looking with sweet white wings of doves instead of how they are actually described in the bible.
People, falling prey to what they WANT as opposed to what IS, since Adam and Eve
LOL