For people who run more than one
If you look after several profiles, landing on the oldest one at every login was a small daily chore. A new phone or browser also forgot which workspace you were in.
What's new
Logging in takes you to the workspace and profile you last worked in, not the oldest profile
Picking another workspace from the menu opens the profile you last used there, not its oldest one
Your account menu lists the workspace you are in and any you pinned first, then the ones you opened most recently
A new phone or private window opens the same profile as your laptop, because it is saved with your account