The frustration of semi-global preferences
I dislike when online platforms are split into multiple sub-sites (sometimes called servers, instances, organizations, or groups), such that each user has one profile on each sub-site and each profile has its own settings. Slack works this way, as do Meetup and Stack Exchange. For example, if I change my personal Slack settings in one organization, my settings for other organizations do not change.
Why do these platforms work this way? I see no upside for the user. Even if there is some esoteric benefit, I suspect most users find it incredibly confusing. I certainly do. Sure, there may be cases where I want settings to be different for different sub-sites, but that should be the exception rather than the rule