Scarcity versus abundance mindsets in software design, and shipping rough prototypes early:
miniblog.
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What languages have changed the most since their creation?
JS? IIFEs and prototypes to modules and classes.
C++? Plain pointers to smart pointers.
There must be more dramatic examples.
A (slightly dramatic) history of Engelbert's vision for knowledge tools, his prototypes on early timesharing systems, and the transition to personal computers:
Apparently sqlite does not enforce foreign key integrity by default! That's incentive to use something else even for prototypes/small apps.
https://stackoverflow.com/q/15301643/509706