On an individual level: maybe you don't work closely but know the name, might be interested to know ahead of suddenly realising you haven't seen/heard from them

On an individual level: maybe you don't work closely but know the name, might be interested to know ahead of suddenly realising you haven't seen/heard from them for weeks/months; or maybe you used to but they moved to a different group, you're not in touch but vaguely interested if they've left. On a more macro level: you might be interested in an apparent layoff/significant restructuring. Someone used to (/maybe does) run this as an email service ('orgdiff') at Arm. I wouldn't have gone out of my way to do it myself, but it was something to skim with a Monday morning coffee.