Samsung is letting users disable the Bixby button
One of the most user requested feature about Bixby is to let user disable Hardware Bixby Key or at least map it to some other app. Samsung Galaxy S8, S8+; Note 8, all three of them has dedicated Bixby button.
SamMobile spotted that the latest update for the Bixby brings a new toggle to disable the Bixby button. However you can access Bixby Voice by long pressing the hardware key. While Samsung is no doubt, one of the best hardware maker, but their attempt in making AI Assistant has not been much of a success with user backslash due to lack of features and bugs.
However, not everyone who updated the app received the toggle bar, suggesting that there might be a server side switch to activate the feature.