Nice job BB. Looks like it was a long, hot day.
"It has its place and comes in handy when used in a common sense, SAFE manner."
I understand the above statement. I agree in certain scenarios. I don't want to open that can of worms.
That being said, I don't understand how the picture shows common sense, or safe practice. Using a saw without a long enough bar to go through big wood, any Certified Arborist can see the potential for kickback. Doesn't one-handed chainsaw use here seems not only dangerous, but even dubious?
I understand it was a hot job, and sometimes my crew has to be reminded of safe procedures when outside stressors such as high heat present themselves.
Kickback happens to all of us, and you can't prevent it when you are one-handing. I am not wholesale against one-handing, but I don't know if what is pictured is defensible.