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Even a mid-range Macbook can do 10x or 100x more transactions per second on its SSD than a supposedly fast cloud local disk, because cloud providers sell that disk to 10 or 100 people at once while charging you full price. Why would you pay exorbitant fees instead of hosting your mission-critical website on your super fast Macbook?

The computer scientist François Chollet has proposed the following distinction: skill is how well you perform at a task, while intelligence is how efficiently you gain new skills.

All non-trivial abstractions, to some degree, are leaky.

If you find yourself in this situation, resist being driven by sunk costs. When dealing with the wrong abstraction, the fastest way forward is back . Do the following:

1. Re-introduce duplication by inlining the abstracted code back into every caller.


2. Within each caller, use the parameters being passed to determine the subset of the inlined code that

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duplication is far cheaper than the wrong abstraction

If you submitted such work as part of an introductory statistics course, the professor would likely ask you to come to his office hours. And yet it became official policy in cities the world over.

If the Amish approach to technology is radical in its application, it recognizes something plain and true: Although technology does not have values of its own, its adoption can create values, even in the absence of a coordinated effort.