I understand good practices with Drupal Commerce demand that you create a product type/content type pair for each kind of product (determined by the attributes related to each product, like size, colour, volume, etc.) like demonstrated in Kickstart. This is fine as long as you do not have too many product types and view modes, but let's say you have N product/node display pairs, each of which has M view modes (and possibly you are using Display Suite for these view modes), then you will have to repeat 2NM times the same kind of operations: first you will have to share the same fields across all these entities, then copy the exact same settings under «manage display».

From a software engineering point of view, this could be solved by introducing the concept of inheritance, as in object oriented programming, so that a bundle could inherit fields and display settings from a main object. Unfortunately, we are not there yet. There is a module called Bundle Inherit, but it does not seem to be maintained that much; moreover, there seems to be no consensus on this topic, as demonstrated by these conversations: Inheriting fields from a base content type and Bundle inheritance.

How would you handle this kind of situation in Drupal Commerce?