With more than two wires I've found that middle wires may not be clamped against the others properly. They remain straight.
In this situation I usually twist with pliers and then trim the ends to equal length.
Speaking of craftsmanship, a basement room job done by amateurs had a half volt extra voltage for the 20' or 30' length of #12 when I was pulling 10A through that branch and the tenant was complaining about flickering lights.
It was a wirenut with three wires with the center wire barely holding and straight.
A half volt at 10A is 5w, quite a bit of power to be dissipated in something as small as a wirenut.
The guy also had a three way switch arrangement and I insisted on testing all four combinations before they put the drop ceiling in place. Sure enough, it was only partially working.
There still may be some problems lurking in that place.
In some counties you can take an exam and then wire your own house to Code so you will save the labor cost.
And there are probably connectors way more reliable than Wirenuts that don't depend so much on operator skill,
but maybe less convenient to work with.