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"It is better to have 100 functions that operate on one data structure than to have 10 functions that operate on 10 data structures" - SICP <3

I’m guessing SICP took that from Alan J. Perlis, considering he wrote the foreword.

It's from the forward. Page xvii in this copy: https://web.mit.edu/6.001/6.037/sicp.pdf

I would posit that this is also why spreadsheets and shell scripts remain so widely used.