I still use 25 year old solar powered calculator.
At its time it was a very fancy device with many functions and features and its price (at that time) is comparable to the price of fanciest 6 inch e-ink device today.
Nowadays you can purchase calculator with very similar features for some 4 Euro.
I also own a collection of old computers in working order.
My Commodore C-64 is more than 20 years old. It still works perfectly, but frankly - what can it be used for today? Loading of 64kB game from an audio cassette tape takes some 15 minutes and my slightly obsolete mobile phone has greater graphics resolution than my old C-64.
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