Position and Hold at uncontrolled field

I was returning to LOM today and after one plane had landed but not yet
cleared the runway, a pilot at the approach end announced "position and
hold". He taxied into position and waited for the previous aircraft to
clear the runway. He then made a normal departure. I was taught at
uncontrolled fields to never take the runway unless you can depart
promptly. Why? In case an aircraft is landing that you aren't aware
of. You may not be aware of the aircraft because he doesn't have a
radio, he called and you didn't hear him, you can't see him, etc.

Is this a new training technique to get students ready for controlled
fields? Most everybody has a radio at my home field but I fly into
fields where many pilots don't have or don't use their radio.

Dave
68 7ECA