Previously all sessions were used
library - procps_users counted sessions, not user sessions
w - showed all sessions, not user sessions

$ loginctl list-sessions
SESSION  UID USER   SEAT  LEADER CLASS         TTY  IDLE SINCE
     10    0 root   -     17860  manager-early -    no   -
     12 1000 csmall seat0 19370  user          tty5 no   -
      5 1000 csmall seat0 4629   user          tty4 no   -
      6 1000 csmall -     4644   manager       -    no   -
      9    0 root   seat0 3633   user-early    tty2 no   -
$ loginctl list-sessions
SESSION  UID USER   SEAT  LEADER CLASS         TTY  IDLE SINCE
     10    0 root   -     17860  manager-early -    no   -
     12 1000 csmall seat0 19370  user          tty5 no   -
      5 1000 csmall seat0 4629   user          tty4 no   -
      6 1000 csmall -     4644   manager       -    no   -
      9    0 root   seat0 3633   user-early    tty2 no   -

5 sessions listed.
$ loginctl list-users
 UID USER   LINGER STATE
   0 ...