I did and 50 was an obvious exaggeration, although for most tech like this we are looking at 2 decades in general. Our tech advancement was generally concentrated on the evolution of existing ones with huge breakthroughs being very rare.You should go look at what technology was like 50 years ago because you obviously don't understand the rate of advancement.
We went from the first microchips to personal computers in around 20 years.
We went from the first mobile phones to the first iphone in 20-30 years.
We went from ARPANET to commercial use of the internet in about 30 years.
It took lithium ion batteries about 10-15 years to go from labs to the first commercially available battery.
Going from something done in a lab to releasing a "revolution" in computing is not going to happen in a short amount of time. Just like we still don't have many of the most highly anticipated technologies. Making something good enough for mass production is halla hard.
For example, I really hoped we would have Photonics in our CPU/GPU by now after so many announced that it was "ready" in labs over the past decade. The development has only recently been accelerated because of... AI investments.