Slowly but surely I think modern mass manufacturing is going to move towards personalised mass manufacture. I think in the meantime the clothes industry needs to do a better job of sizing, that is providing more detailed measurements so they can be selected better. At some point I ought to be able to buy a pair of trousers where I have defined more than just waist and length and especially true for tops based on chest or generic sizing. We can do this a lot better, its not intrinsic to suits they are just worn enough that bespoke services exist in quantity.