If you have an android or apple, you should just plug your phone in and use it's Google maps or Waze on your car's screen, instead of whatever the built in GPS program is. It even has the added bonus of auto-rerouting you if there's a temporary road closure, traffic, etc.
I don't even know if my Niro is equipped with GPS or not, I never checked because I just logically assumed it would probably be much worse than just using my phone's gps.
So to answer your question, no I don't see it as being worth it. I wouldn't even pay a dollar for a map update. Even if you REALLY want to use the car's GPS, I can't imagine the roads have changed that much in the last 2 years.
The only scenario where I might consider it is if I frequently drive somewhere without cellular data signal, but even then I'd probably just get a $50 portable GPS from Amazon instead of paying that insane software patch fee. And with Google maps on your phone, you can usually download offline maps to use when you have no cell coverage.