"FWIW, I used to hear that frequent use of pastes and/or sprays leads to rounded edges and convex bevels. Anyone have an opinion on that. Is it a falisy, or is there some truth to it."

There are two logical reasons why pastes must eventually change the geometry of the bevel. First, they are abrasive and, secondly, stropping is done in a direction opposite to honing. The edge may not be rounded as a result, but the sharpness of the bevel edge geometry must eventually succumb to the abrasion. I tried pastes one time, couldn't see a difference, and have stuck with steel and leather ever since.