It would be the solution to phone obsolescence. This concept, paired with project treble would allow us to run our phones for as long as possible. Want a screen with more pixels? Just install one. Phone getting behind on specs?Change the cpu or add ram. Want a better camera? Just get a new one. At some point, the chassis would need to be replaced, but even then, you could reuse some of your installed conponents. It would be so awesome.