Which was caused by technological progress which is the key source of deflation (being able to buy more with the same amount of money). It is deflation is happening regularly:

> But Inflation is not inevitable. There are numerous countervailing forces that have been at work for much of the past 50 years. The three big Deflation drivers: 1) Technology, which creates massive economies of scale, especially in digital products (e.g., Software); 2) Robotics/Automation, which efficiently create more physical goods at lower prices; and 3) Globalization and Labor Arbitrage, which sends work to lower cost regions, making goods and services less expensive.

> Put into this context, Inflation is periodic, driven by specific events; Deflation is consistent, the background state of the modern economy. To fully understand this requires grasping how scarcity and abundance act as the drivers of the price of labor and goods. My suspicion is many economists who came of age during earlier eras of inflation fail to discern how the world has changed since.

* https://ritholtz.com/2021/02/stop-stressing-about-inflation/

This 1991 Radio Shack add illustrates the point quite well IMHO:

    There are 15 electronic gimzo type items on this page, being sold from America’s Technology Store. 13 of the 15 you now always have in your pocket.
    
    So here’s the list of what I’ve replaced with my iPhone.
    
    * All weather personal stereo, [US]$11.88. I now use my iPhone with an Otter Box.
    * AM/FM clock radio, $13.88. iPhone.
    * In-Ear Stereo Phones, $7.88. Came with iPhone.
    * Microthin calculator, $4.88. Swipe up on iPhone.
    * Tandy 1000 TL/3, $1599. I actually owned a Tandy 1000, and I used it for games and word processing. I now do most of both of those things on my phone.
    * VHS Camcorder, $799. iPhone.
    * Mobile Cellular Telephone, $199. Obvs.
    * Mobile CB, $49.95. Ad says “You’ll never drive ‘alone’ again!” iPhone.
    * 20-Memory Speed-Dial phone, $29.95.
    * Deluxe Portable CD Player, $159.95. 80 minutes of music, or 80 hours of music? iPhone.
    * 10-Channel Desktop Scanner, $99.55. I still have a scanner, but I have a scanner app, too. iPhone.
    * Easiest-to-Use Phone Answerer, $49.95. iPhone voicemail.
    * Handheld Cassette Tape Recorder, $29.95. I use the Voice Memo app almost daily.
    * BONUS REPLACEMENT: It’s not an item for sale, but at the bottom of the ad, you’re instructed to ‘check your phone book for the Radio Shack Store nearest you.’ Do you even know how to use a phone book?
    
    You’d have spent [US]$3,054.82 in 1991 to buy all the stuff in this ad that you can now do with your phone. 

That US$1600 Tandy 1600 runs a 286 CPU and has a 20MB hard drive, and supported 640×200×16 resolution (720×350 mode for monochrome monitors):

* https://en.wikipedia.org/wiki/Tandy_1000#Tandy_1000_SL_and_T...

If you wish to run the same software as was run on that machine, you can still do so on your desktop/laptop:

* https://en.wikipedia.org/wiki/DOSBox

Or even in your web browser:

* https://js-dos.com (JavaScript DOS)

* https://archive.org/details/softwarelibrary_msdos_games

Somehow people don't notice the deflation happening all around them.