A while back they used 3D body scanner to remeasure the population in an attempt to achieve better fitting garments.
The overall results were pretty much the same in every country: People have become bigger (vertically and horizontally).
Why they needed a 3D scanner for that escapes me, but whatever (since it was pretty obvious, just look around)!
The funny thing is, by using an "average" of all measurements taken they are not better off than before. There will still be a lot of people that won't fit into the clothes, simply because one (or more) of their measurements won't be "average"!
Another problem is the streamlining of production, which means that the lines of the seams need to smooth, so that even untrained staff can sew the garments together in relatively short time.
Speaking of time: If you consider that, for example, a MTM suit is made in a few hours and you pay between 300,- to 1500.- Euro (depending on cloth and company, maybe even more), paying 2500,- to 7000,- Euro/ $/ GBP is still the better value for money, given that there are easily 10x more hours in a full bespoke suit.
I really don't know why certain companies (real tailors or high end RTW ) market hand work as being the only true solution and the main factor or ingredient for the value of their product.
Both methods of sewing (hand and machine) have their benefits, so use them accordingly. It shouldn't be about saving time, but getting a better result. And with the fine cloths today, the machine definitely creates the finer seams. Leave the handwork for areas of the garment where they make a difference for the better, like the lapel or the chest canvas or the outer finishing (edgestitching and buttonholes).