Bertel Schmitt:

TNGA is no modular system as one would expect. Toyota still has platforms, maybe a few less, but platforms they are nonetheless. The peanut gallery in carblogs doesn’t even have to start the handwringing about the soul of the car being sold to the devil in the common parts bin. Kato had a slide that showed common parts in green/blue, and individual parts in yellow. Result, see above.
 The revolutionary part of TNGA is not the kaizen-continuously-improved product, the revolution is a new production process where the small and sprightly slay the long-tailed fire-belching dragon of the old assembly line. Production engineering is the under reported, but über-important element of the car business. It is where Toyota excelled, and it is where Toyota will excel even more.