I wasn't there at the time, but I believe that most assembly programmers learned higher-level languages.
replyMy mother actually started programming in octal. I don't remember her exact words, but she said something to the effect that her life got so much better when she got an assembler. I suspect that going from assembly to compilers was much the same - you no longer had to worry about register allocations and building stack frames.
It was a trade-off for a very long time (late 1960s to late 1990s IMO): the output of the early compilers was much less efficient than hand writing assembly language but it enabled less skilled programmers to produce working programs. Compilers pulled ahead when eventually processor ISAs evolved to optimize executing compiler generated code (e.g. the CISC -> RISC transition) and optimizing compilers became practical because of more powerful hardware. It definitely was not an overnight transformation.
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