I went to bike mechanic school in 2009 to get my certification. My thoughts.
Machine-built wheels are generally inferior to their handbuilt counterparts, not because of any inherent differences, but in the amount of time the wheel is built. Failing to pre-stress metal components is key.
We were taught to bring spokes up to some tension, leave them a few minutes, then detension them fully, and only then begin the dish / true / tension loop until finished.
We were pre-stressing all components first and then taking our time during the build. This allows the metal to settle in easier - less "muscle memory" - and maintain a more constant tension than anything built in a hurry.
I can't ever remember having to retrue a set of wheels I built. Not even a little, and I was quite fastidious about truing spec - within 0.5mm lateral and 1mm vertical. So every wheel I built stayed true for the rest of its life.