I just don't buy this premise. _Some_ systems are more usable. But take a look at Microsoft Excel from circa 1995-2000, which came with a big thick textbook of documentation, explaining what every single menu item did. Every single menu item was written in natural language and it told you what it would do. Professionals used (and still use) Excel, crafting workflows around the organization of the UI. It's a tool that is used by actual people to accomplish actual tasks.

Now look at Google Sheets. It has about 1/10th the functionality of Microsoft Excel (hell--it can't even do proper scatter plots with multiple data series) and its UI is an undiscoverable piece of crap because half of it is in _iconese_--a strange language of symbols that are not standardized across applications, confusing and ironically archaic depictions of telephones, arrows, sheets of paper, floppy disks. The program is written in a pictographic language that must be deciphered before being used. Software doesn't even speak our natural languages anymore...we have to learn _their_ language first...and every application has its own and that language changes every six months. Worse, all those funky pictograms are buttons that perform irrevocable actions. They don't even explain what they did or how to undo it...it makes users less likely to explore by experimentation.

...and there is no manual, there is no documentation. It will be all different in six months, with less functionality and bigger--different!--icons...takes more memory.

We are regressing.

Hey but those animations are spiffy.

/rant

So I agree with you that computer time is cheap and user time is not, but I think we could optimise better for user time.