Back to voltage drop and my garage / shop.
My main purpose at least for now is a car project....it is on a lift in my garage. My dedicated elec. service panel is on the back wall. Most of my welding is conducted about 15' away from the service panel so my ~ 16' extended cord (for now) is perfect.
I could have done and my still may do the dedicated portable cord but at the time I was concerned about volt drop and having the most direct connection and the hassle of the big plug/receptacles.