"If everyone would just stop replying, this would end! Why are you all still hitting reply all?!" -latest reply all on every reply-all storm. In my early days at Amazon, around 2012-2015, this would happen frequently enough [0]. I pretty quickly learned the best thing to do was to ignore the conversation and never think about it again rather than try to 'help'. [0] - too many new products and orgs set up new mailing…
Never really happened to me, but Thunderbird has a pretty good feature for this case: "Ignore message thread". I'm sure other mail clients have this feature as well. If someone is bothered by such a thread, it's really easy to avoid.
I admit have been tempted to respond to some reply-all maelstrom mailstorms to herald the mute key…