I can select a plane and two circles and it does all the work for me! I don't even need to create a line between the circles. Also, it helps with my OCD. I always worry about which order is technically correct.
Anything that cuts down on the thinking that you do worries me when programming. I want to know what's being done and why. Then, like
anthony.alfaro stated, you can better troubleshoot when things go wrong. If I was to use it, I would double check what the Demon did before I just went with it.
I guess the answer to your question
Lukas is it's mostly new programmers who love autoalign, others tolerate it if they do use it.