Not that I dislike being able to see more granular information about a user's most recent activity again, but that feature seems to run directly counter to the decision to intentionally obfuscate the 'last seen' value on user profiles in the name of privacy, as part of the near-universally reviled 2021 profile page redesign.
How will this feature work with/affect that profile information? Is Stack Overflow (partially) walking that change back, by exposing currently active users again? "Last seen 1 hour ago" is a lot more recent than what I can see for anyone else on their profile, as a non-moderator; profiles currently only go as granular as "this week" unless you're a moderator or looking at your own profile.