[sekou]

I think if we're talking about compilation as an analogy we're talking about being able to customize the phone to very specific specifications before it's manufactured (battery size, camera type, headphone jack, etc) and then having the phone constructed in the same sealed kind of way any modern phone is made. That might be interesting if the manufacturing process could be made cheap enough.

[m_mueller]

Exactly. I think the most common usecase would be to choose between different case thicknesses with the ability to add an additional battery in this space.