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That's nice. Reminds me of my childhood, making what I would later find out are called "
Demos" using BASIC on a 256
k Tandy XT with no hard drive. And there was no mouse, so using the paint program required copious amonts of arrow keys and space bar.

Alas, our ancient history and nostalgic reveries have no bearing on the current fact that sig_op verification scales as a quadratic of the tx size.
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First I am going to comment on the punched card vs the 256 KB Tandy XT. My experience with the punched card was in the mid to late 1970's where this technology was reaching the end of its useful life. The latest punched card standard was formulated in 1928 and together with the tabulating machine was the primary form of data processing for big business and governments until the 1960's when tabulating machines started to get replaced with mainframe computers. The relevant point here is how much data could one store on a punched card. Theoretically 120 bytes and many people quote 80 bytes; however due to the limitations of the then legacy equipment from the 1920's to 1960's the figure was closer to around 10 bytes. Now if we compare this with the 256 KB Tandy XT we have a factor of over 10
4 in data storage capacity alone. The computers from that era typically came with one or more 5.25in floppy drives and the floppy diskettes would each hold about 360 KB of data.
This difference in storage capacity alone is greater than the difference between 1 MB blocks in core and the 8 GB blocks proposed in XT for Bitcoin.The next question is why is the ancient history highly relevant here? The reason is business models. While technology changes rapidly business models tend to remain static. The key lesson from history is to avoid business models that are dependent upon technology staying still. This is why Diner's Club and even American Express form a very small percentage of the fiat payment networks today, yet in say the early 1960's they were the dominant players. Their payment card business models were based upon punched card and tabulating machine technology and started to run into trouble with the advent of computers such as the 256 KB Tandy XT let alone with today's technology.
It is here where we see the strength of Monero's adaptive blocksize technology. If the real cost of digital storage, bandwidth and computer processing power drops by a factor of say 10
4 (Punched card to 256 KB Tandy XT) then the cost of processing 50,000 TPS becomes in real terms the same as processing 5 TPS today. Bitcoin with the Lightning Network can easily become the Diner's Club of Crypto currency (an early adopter that becomes obsoleted by changing technology) while Monero can easily become the VISA or MasterCard of Crypto currency (a later adopter that can adapt to changing technology). As a baby boomer in my late 50's I have very little interest in business models that have a very good chance of becoming obsolete in 10 - 20 years. I prefer instead business models that can adapt with technological change. So I choose Monero.