[mvp]

Those time periods are what most tech people consider as when those technologies really took off. And therefore it makes sense to say that. If he was writing a history of computer science, I agree that it would have been inaccurate to say that.

[nickpsecurity]

An example to support your view might be the switch to the trend of paying to use server resources like a utility. Centralized resource managed by people other than users that ran many parties' workloads with metered CPU, RAM, etc usage. Then, the various devices access it through a standard UI instead of native apps recoded in many OS's. Quicker setup for new users than rolling their own. Increased flexibility with the virtualization. Better physical and online security due to the centralized monitoring.

On the software side, people found that safety, scalability, and maintenance were important. They needed high-level languages that did things like bounds-checks or stack protection. They needed the ability to freeze and inspect errant programs instead of crash them. They needed the software interfaces to check for right data being passed. They needed to scale on multiple CPU's. They preferred their OS's to come with source code for easier fixes or extensions.

Im sure you know all about those two mainframes from IBM (1963-1970's) and Burroughs (1961) that did those things. Then came to power most large business and government institutions critical apps to this day. Anyway, I hear people made incremental improvements doing similar things with x86, Linux, and vastly lower cost-per-resource. Incremental improvements on capabilities that took off in the 60's. ;)

[angersock]

"Most tech people" must mean people under the age of 25 without much knowledge of history.