In that situation it would used with the intention of leaving a na tural look. The problem is the branch is not still.alive, only a small part of it is. You can already see the decay tracking back and bark flaking. On a mature tree like that there wil be distinct connections between large roots and low limbs. I would expect to see a zone.of dysfunction beneath the limb on the stem and down to roots in a few years.
I don't think coronets make much more new shoots than any other cut, but to the untrained eye the tre.maintains that maiden look, a big stub will always look man made