So you purchased a dirt bike originally and never had time to take him out on it. I can see that. Then you replaced it with a ebike that was totally overkill. I can see that as well. If it was me I would have split the difference and gotten him a Honda Ruckus or Yamaha Zuma. Not sure about your local areas minimum age for moped operation, and/or what it entails, but he could learn the rules of the road and you could "borrow" it when needed to do beer runs and such. I've only ever seen a Wired once in the wild and it was beat-up and huge, looked like it was crashed a few times. Also looked kinda cheap up close. I know cheap, I was on RadRunner 2 when I saw it.
I say test him with the Wired. Good way to see how he handles the responsibility and temptation to unlock it! Also 100% ensure he wears a helmet. Kids hate helmets, young adults accept them and wear them.