The code change only impacts amethyst. But the negative impact/aftermath is on all other clients and users.

-ve impact on users :

When users can’t see content, they are at a loss. If this becomes frequent, Nostr becomes contentless and pointless.

-ve impact on clients :

Client devs cannot be stopping everything and implanting new changes everytime one client makes whimsical changes. Hence you have every right to be upset

Use cases of NIP 94

The various use cases Vitor brought up should be explored and tested. But not yet implemented until all clients agree as it impacts everyone.

Consensus

There has to be some ground rules that requires consensus among Devs when it cannot be done on NIP itself. For example :

1. Major changes in protocol

2. Unintended NIP implementations

3. Changes that impacts users on other clients