For $5.00, it has all of the features of the Pi that I actually use...and nothing that I don't!
I just ordered a budget kit from Adafruit, to finish the APRS i-gate/digipeater that I've been working on. If it works out (and they get unbundled $5.00 boards in stock again), I'll order a second one before the holidays to move my ADS-B receiver outside where it can get a better view of the sky.....