Over the years I've observed that people going from BIAB to other systems usually do so for a certain reason, not ease or efficiency. The main reason often seems to be the ability to do double or triple batches.
There's also a desire for "reproducibility" of a favourite brew but I have no problems at all in producing a perfectly standard wort from brew to brew (My American Wheat for example) so I think this is a bit of a furphy. Some people have a mindset that BIAB is somehow a "seat of the pants, let's wing it and see where we end up" system. Not so.
If I start with a standard amount of strike water at a certain temp and certain mineral content, mash at a certain temp which I can calculate accurately knowing the weight and temperature of the grain etc. Then mash for an exact time, with steps if necessary, I'm going to get the same wort every time. I'd say that batch to batch fluctuations in grains would have far more effect on reproducibility than anything I'm doing.
Commercial breweries employ rooms full of techs to control this aspect, it's an important factor.
Also as in any hobby there are the techies who just love to get into their machine shop with their lathe and program their Arduino (one of these days I'll have to find out what one of those is 
) but at the end of the day, BIAB or 3v or Herms is just one step in grain to brain, namely sweet wort production. You can produce identical worts from brew to brew but when you pitch and forget to switch on your fridge and remember with horror as you are sitting in the office, reproducibility has just flown the coop :lol:
