The argument that it is prohibitively expensive to maintain multiple copies of the ledger (keeping track of the cups of coffee) on computers and devices owned by private indivduals today is far less compelling that making the same argument back in 1949 for a single ledger (keeping track of the cups of coffee) held by a bank using the data processing technology of the time.
As for BIP101 moving the blocksize from 1 MB to 8 GB over 20 years, this is actually equivalent to moving from the punched card (80 bytes) in 1965 to a computer with 640 KB of RAM in 1985 and saying that the latter should be enough for anyone.
Diner's Club was created not for schmucks buying cups of coffee, but rather for rich (Masonic?) lawyers/financiers eating fancy meals in exclusive cosmopolitan restaurants ("33 West 33rd Street, 33 steps from the Empire State Building").
https://en.wikipedia.org/wiki/Diners_Club_International
http://history1900s.about.com/od/1950s/a/firstcreditcard.htm
Even today, your neighborhood micro-roast provider may charge 50 cents extra to account for the friction of a small debit/credit payment. So please stop with the bogus proxy allusion to Moore's
Satoshi said Bitcoin may be used for micropayments "eventually."
That eventuality comes after Bitcoin breaks the bankster monopoly and restores sanity+honesty to the financial/political realms.
Until then, it is an engineering requirement Bitcoin be above the law.
You'll get your coffee payments eventually (when it is safe for full nodes to be relegated to data centers), but Sorry, Not Tonight Dear.
You are correct. Diner's Club was initially conceived as a way for very wealthy individuals to pay for high margin goods and services from high end merchants. The merchant is charged a high fee upwards of 5% in order to cover the cost of maintaining the ledger with the technology of the time. The merchant gladly pays the fee because the card company facilitated a sale with a very high profit margin. The same model was also used by American Express when they started in 1958.
Now Diner's Club had 0.2% of the credit card market, and 0% of the debit card market, while American Express had 8.2% of the credit card market, and 0% of the debit card market in 2013. http://www.nilsonreport.com/publication_special_feature_article.php. The winner in 2013 was VISA 48.5% of the credit card market, and 70.5% of the debit card market. What happened is that the Bank networks (VISA, MasterCard) starting in the late 1960's and 1970 with credit cards and in the 1990's and 2000's with debit cards saw the benefit of the plunging cost of keeping the ledger including even tracking the "schmucks buying cups of coffee" due first to the mainframe computer, then the PC, Internet, mobile devices etc and adapted. At the same time Diner's Club and to a large extent American Express stuck with their business models that were based on the costs in the 1950s of keeping the ledger using punched cards and tabulating machines. This is the key lesson from the history of credit and later debit cards for crypto currency.
Bitcoin is making the very same mistake in crypto currency that Diner's Club has made over the past 60 years with credit cards namely: Ignoring technological change. It is destined to a similar fate if it survives. Litecoin is also doing a similar thing following in the paths of American Express. There is another alt-coin that has a good chance of becoming the VISA of crypto currency because it has both adaptive blocksize limits and a tail emission. This will allow it to: Adapt to technological change.
My prediction is crypto currency will be used for micro payments furthermore many copies of the blockchain will be stored on computers and devices (including mobile) under the control of individuals. These computers and devices will also have Terrabytes and Petabytes or more of storage (no need for data centres). The real question is which blockchain will be stored on these computers and devices. Unfortunately here my prediction is that it will not be Bitcoin unless some real drastic change does occur.
We can discuss which alt coin in the alt coin section.
Edit: As for the banks I suspect they will still be around. There is no need for them to be put out of business for the above to happen, because technology will democratize the "keeping of the ledger" even way more than today. This is the lesson of history.