Wakandan society had the similar suspension of disbelief can experience with alien races in Star Trek. The Klingons achieved FTL travel and colonized space and yet still engage in ritual combat and have warring families.
The economy makes little sense unless vibranium is the explanation of how an isolated landlocked country has the resources to be at roughly hundred years advanced tech.
Killmonger's father was a traitor in the sense he differed with his brother on Wakanda's role in the world. He felt they should help black Africans all around the globe. He was vindicated in a sense as resolves with Wakanda sharing with entire world their knowledge, so by Avengers 5 every major city on Earth should have future tech.
I know it doesn't really matter, but on Marvel Earth if Killmonger thought he'd take over or change the world when have Avengers super heroes around. The escalation issue makes such plans seem a bit difficult.
