Instead of buying the 5$ electronics component for 10$ at a phone retail shop, an increasing number of people orders it from China for 5$ (including shipping fee).
Customers could have their own phoneblock parts custom-made directly in the factories. You could design an add-on, have 100 of those made, just order one for yourself, then let the manufacturer sell the other 99 world-wide and you will receive a small designer’s fee per sold item.
I feel that the weakness of this proposal is that the modularity as shown would address only computational capability and no affordances of adapting physical dimensons, ergonomics and material properties, or mounting it to other devices.
