Thanks for the heads up about Amethyst's caching mechanism and the difficulties it presents in effectively muting relays. Perhaps, as Amethyst continues to improve its functionality and undergo updates, such use cases will be taken into account too.
On the bright side of things , I LOVE how Nostr users continually work together to build new and improved features like feeds, with developers like #[6] tirelessly trying everything possible to make Nostr experience smoother for everyone involved.