>Since Kierkegaard was totally forgotten and wasn't rediscovered made popular in Germany by Boltmann till the 20th Century

I don't know where you got this, but it is an exaggeration of the truth. And unless you think the same thing is just waiting to happen to all the other philosophers that surrounded him, doesn't change the fact that most philosophy is tossed aside for good reason.

And yes, the same can be said of many different fields.