What is the origin of Growing ones beard in Orthodox Circles?

In response to this question posed by ????_??? Regarding beards in the frum community
Although Reb Yoinoson did not answer the question directly he responded to some of the comments on the forum. I added the question and� Below are Yoinosons comments.
One of the major outward features characterizing Chasidishe males is the growth of a full [...]