https://youtu.be/q_NXq7_TILA
For years I had the opinion traditional mortise chisels had a such format for limitations on the quality of available steel in the past. It was reinforced a few years ago when I watched this movie and now "accidentally" I found it again as automatic YT suggestion.
Definetivelly I am not an authority on the subject and I really would like know your experience and practice. Please forgive me if this theme was raised on the past but I couldn´t find.
Thanks in advance for your feedback.