Why would there necessarily be pro's and cons? It would just seem to be preferences. Sometimes I do one, then do the other.
You would save a little on brake shoe wear, or wear a little on engine clutch and transmission. Brakes could fail during a stop, and you could just let out the clutch in a lower gear. I have had that happen.
Just as often as having a clutch fail and drive home without one.Had that happen twice.

Last edited by LeeP; 03/06/2018 3:58 PM.

1961 ford f500
1953 3100 five window (https://www.facebook.com/1953-Chevrolet-5-window-1533405913413610/)
1955-2 3200 big window (https://www.facebook.com/Leep3200/)
55yrs as a mechanic and retired. (kind of)