Have you considered the possibility that people aren't as stupid as you think and that these tools actually solve real problems?
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Tools can solve important problems "and" increase the complexity to point where they create other problems which makes the trade-off untenable.
This part:
> What happened to KISS?
Right on that page is an example of "Keep it Simple" without the "Stupid". A charitable reading of parent's comment wouldn't have thought the commenter was labeling anyone stupid with the appeal to keep things simple.
> Whatever happened to KIS(S)?
Interesting question, I wonder how the entire ecosystem forgot this one simple trick? What is it about their brains that causes them to create all these solutions that are apparently worse than the problem?
Q: "What happened to KISS?"
A: "It fell by the wayside when it began to be interpreted as a personal attack."