Throttle by wire is becoming practically common in all new vehicles. Sure gave Toyota a lot of headaches, gather running a wire is cheaper than using linkage.
On my 2012 2LT with a MT, noticed when I took my foot off the gas, engine was slowly down as quick out of BB warranty. Removed the air inlet, need my wife to step on the gas, can't do this at the throttle body anymore, and spayed in some choke and carb cleaner, working good again. Just a little bit of soot from returning the PCV back into the turbo input, not a good idea. Sure caused Ford a lot of grieve.
In neutral you can rev the engine to make sure it responds quickly, 3000 rpm is enough.
I find TBW an inconvenience when working under the hood, so need an assistant for things like tracing down noises. One thing it does do is makes adding cruise practically no cost at all, just shifting the reference from the gas pedal to preset code by the cruise control buttons. But GM sure went out of their way to make adding cruise for LS owners. This is downright nasty. Everything is there except the buttons.
Kia is the same way, but was only 15 bucks for a button panel, but added another 40 bucks for a new harness with a couple of more wires on it to keep my daughters car stock.