Definitely made some poor choices in life due to these that I could scream into a pillow. The future is always unpredictable, and while behind the scenes I'm sure a lot happened to improve both of these technologies, more than a decade later the use cases of both are still the same - grifting investors.
CGPgrey did make a ton of prediction on the future of these 2 technologies, but did overestimate their potential in the near future. That much is evident 10/8 years later. The only thing they really excel at is getting money from starry eyed investors, which you can then run away with. Same as it was back then.