I, like you, was chatting with ChatGPT and Gemini about EMI/RFI and the use of mix-31 ferrite chokes. I ended up buying a bunch of sizes and clipped them onto every power cord and wall-wart barnacle in my rack, plus on the power cables to my subs. The difference was noticeable—my audio through Roon, Qobuz, and even Apple TV streaming sounded cleaner, less noisy. Subtle, but playback felt more relaxed.
I figure each device benefits from having a choke right at the input. You can also stack filters, even at the wall. I added some to my power conditioner too. There’s really no downside—chokes are inexpensive, and the improvements, while not night-and-day, are definitely worth it.