This is probably the best modern writeup on decoupling capacitance that I've seen. It's clear and brings the receipts!
https://codeinsecurity.wordpress.com/2025/01/25/proper-decoupling-practices-and-why-you-should-leave-100nf-behind/
My EE colleagues at Oxide (who are much better at this than I am) have been trying to drive this point into my head for years.
In related news, I just last week made my first board that was unstable at full CPU speed until I swapped out the 100nF "habit cap" for a 1u. It's real!
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