Synth Power Filtering: To Bead or Not To Bead ?

(and the referenced North Coast article: https://northcoastsynthesis.com/news/the-truth-about-ferrite-beads-will-shock-you/ )

I've noticed that Befaco in particular uses ferrite beads in a lots of digital Eurorack modules, and I've always wondered if they had a good reason or if it was just superstition. I'd love to hear the experience of a module manufacturer on this issue ... something along the lines of "we added the ferrite beads since it failed FCC EMC compliance without them".