UTMP being phased out: - Why "who" returns empty output on modern ubuntu

So, while operating on an Ubuntu 25.10 I had to use who to check the session, and something weird happened it basically didn't work, for a simple command not to work, I knew something was up with my machine so I did some digging, turns out the next alternative "w" was working just fine but not who . My curiosity rose I checked out Launchpad Bug #2130814, other people encountered it as well and everyone had a different theory why the "who" not work but "w" did. So what happens is if you run "who"