This is an important question. The skepticism tracks with my personal experience - I feel 10-20% more productive but certainly not 5x when measured over a long period of time (say, the last 6 months or more)
I’m nonetheless willing to be patient and see how it plays out. If I’m skeptical about some grandiose claims I must also be equally skeptical and accepting about the possibility of large scale effects happening but not being apparent to me yet.
>>aerhar+(OP)
There were many similar transformations in recent decades. I remember first Windows with true Graphics User Interface was big WOW: productivity boost, you can have all those windows and programs running at the same time! Compare it with DOS where you normally had just one active user-facing process.