R2-D2 was a mech. droid. Why did R2-D2 have the ability to record & project holograms?
It does not seem to be for R2 to communicate. R2 was able to communicate with other entities in different ways:
- Aural beeps and chirps for the living beings around him (and droids like 3PO that understood the chatter).
- With other machines via a seemingly standardised physical plug-in (what, no wireless connectivity in the galaxy far, far away?).
In any case, I can't recall evidence of R2 actually being able to generate a hologram, just record and replay them, which would make him more an 'answering machine' than a droid that uses holograms to communicate.
Why did R2-D2 (or BB-8 for that matter) have this ability to record & project holograms?