As recently as the 1980s, it was normal for "real-world" programmers to laugh at the idea of structured programming languages with such arcane features as "while" loops, as opposed to the jump instructions of assembly languages. How could a program written in a structured language possibly perform well enough, compared to hand-written assembly language? Those crazy academics are at it again, with their nutty theories. Of course, today the abstraction of structured control flow is ubiquitous. Data abstraction was another that seemed esoteric at first but has become completely standard now. Serious programmers today will laugh at anyone who uniformly writes off these techniques that seemed like theoretical distractions in 1980.
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