First of all, I absolutely LOVE ebony. The thing is, solid black ebony is increasingly difficult to acquire. And the sad truth is, brown ebony is just as good a material, but guitar builders want the blackest of black ebony. I understand this perfectly, that black ebony board looks and feels fantastic. It's a dense hardwood, and should last more than a lifetime.
Richlite is going to be 100% sustainable, and so whether you or I like it, or not, we're going to start seeing a whole lot more of it. And it's good to be sustainable. I definitely think a guitar where ebony had once been used, and now the instrument is being sold with richlite - I think the price should be discounted for that.
No, I'm not seeing prices drop for the richlite, but they sure should be. I'm sure it's a great material for fingerboards. It wouldn't be used to replace ebony were it not dense enough for the purpose, but I guess we'll have to see how richlite is holding up 50 years from now, and ...I kinda don't expect to be here then.