My team has accessibility requirements for things like this. We still use red/green, but we also have a rule that color can't be the only indicator of some kind

My team has accessibility requirements for things like this. We still use red/green, but we also have a rule that color can't be the only indicator of some kind of state. So we'll make a green check or a red X (along with a variety of other accessibility hints and navigation models) so that you can get the information regardless of your abilities. And I think this distinction is important. We're not going to take away the color coding that the vast majority of people can easily recognize just because a subset of the population can't, but we are going to make sure that the group that can't has alternatives available so they aren't stuck.