Spearheaded by concepts from tech giants like Google with the sadly-defunct Project Ara, modular tech is an exciting area that has been garnering a lot of interest in recent times. It envisions a future where, instead of purchasing a new device every year or so, you simply customize it component by component to keep it up-to-date.
Put it this way. When a certain part of your phone breaks, or starts to be superseded by more powerful options, you’d currently either get it repaired or discard the whole thing completely.