The web? GLP-1s? 5G? The newton was mega-hyped, failed but Apple came back with the iPhone. All the dot com failures that eventually became viable businesses (so viable in-fact that sfgate has to reach back 26 years to write their stinkpiece [1])

Hype is often early, in 10-20 years we'll start seeing the value as the rest of the world catches up

https://www.sfgate.com/food/article/rise-fall-bay-area-start...