My favorite thing about Smyrna is that it remains a very friendly place to live and work.
I've lived in Smyrna for over 10 years now. So, I missed out on the pre-Nissan years. Still, it's been growing every year since I've been here. It really is the friendliest town I've ever lived in.
The food and shopping choices have increased. It's still centrally located - Murfreesboro and Nashville are easily accessed. The Avenue is just a couple of exits down I-24, and as long as you avoid rush hour, downtown Nashville isn't much farther away.
Traffic - it's not a huge deal at this point, except at specific bottlenecks at the worst times. Smyrna has 4-lanes both circumnavigating and bisecting the town - good for a town of this size. Rarely is traffic backed up on city streets. The interstate heading to Nashville at rush hour - that's another story.