Understanding Vocabulary in Context: Retrofit

In the following passage, the author reflects on the impact of technology on human interaction:

'As we traverse the digital landscape, the once-unfettered joy of spontaneous conversation seems to have been retrofitted into structured exchanges, where every interaction is contingent upon a series of taps and swipes. In this sterile environment, charisma is often eclipsed by the cold glow of screens, leading us to ponder whether our connections are now superficial at best.'

In the context of this passage, the term 'retrofit' is most aptly interpreted as: