I like replicating things and I want more things to replicate.
The obvious thing is that it turns cards at the cheaper end of the spectrum that are pretty limited on their own into things that get quite powerful quicker than the corp might like. Dyson Mem Chip (with underworld contacts), LLDS Processor (with disposable breakers), R&D Interface, Prepaid VoicePAD...
The less obvious thing it does is allow you to remove duplicates from your stack: once you've got your console and your e3 Implants's out you don't need any more so might as well use the rest as padding for net damage and leave your stack less diluted. If you can't afford to install now chuck it all in the Workshop
What else can we replicate? Replicate all the things.