My favorite graphene story: The gentleman that owns a local detailing store is a really nice guy. Willing to listen and troubleshoot, keeps a lot of products in stock, always helpful, and doesn't immediately go to "buying this product will solve your problem!"
Chatting him up and I mentioned that I was using a graphene coating (Adam's, if it matters). He drops in that graphene is mostly a marketing push, it doesn't do anything more than other products also do, and there are many more considerations in choosing a product other than "it has graphene". A pretty measure response and probably 100% true but the product line he stocked didn't have any products with graphene either.
8 months later, he switched vendors to a supplier whose coatings do contain graphene. Chatting him up again, now graphene is the business. Other products are good, the stuff he used to sell, but what he's got now is the top of the market.
Personally, I think it's being thrown around too much. Graphene tire dressing, graphene glass coating, graphene plastic trim coating, graphene clear plastic coating. I've used tire product with graphene; It doesn't hold up any better than any other tire shine. I've used graphene glass coating; I went back to Rainx on the cars and now use graphene to coat the shower door in my bathroom, mostly because I wanted to use it for something.
I've been happy with the regular Adam's graphene coating. It's not magic; No coating is. Having graphene in the product name doesn't make it a 10-year coating (there's no such thing).
Here's the thing: Everybody wants to be right, that what they chose is the right choice. If they spent $2,500 for a "lifetime" coating from a detailer, they will defend that it's an elixir made from unicorn tears that only professional detailers who know the secret handshake can obtain and it's well worth what they spent. If they think regular old carnauba wax is the best, they'll tell you that coatings are overpriced and overrated. If they use a product with graphene, it's superior to a product without graphene. Take it all in stride.