New thing is not guaranteed to replace the old thing just because it's new. I can demonstrate the absurdity of this narrative by pointing out that every of the thousands of altcoins claims that it's going to replace Bitcoin soon. And yet they don't, just like Bitcoin is not replacing banks.
You are right, but either the new thing is going to work or not the FUD is going to be present always, I believe that's why OP created this topic, it's not about if the new thing will work or fail, it's about the FUD new things get from the old.
Also, Bitcoin doesn't look like a failure since the past many years now, also newspaper doesn't matter anymore because people prefer reading news on their smartphones today, I still prefer Taxis over Uber and Hotels over Airbnb but the new things all works very well.