I agree that the idea is cool, but from what I've heard from people in the role at most companies it's essentially a solutions architect role by another name.
Funny enough, the Pragmatic Engineer (author of the post linked) had a follow up from about a year after the post above and he reports the same thing.
https://blog.pragmaticengineer.com/the-pulse-forward-deploye...
Looking at the official description of a Forward Deployed Engineer I'm uncertain what even the nominal difference between this and a Solutions Architect is.
Is the nominal difference between an archetypal FDE and an archetypal SA greater than the difference in the SA role from company to company?