Terminal is going to need a place to store application "state", including:

• Dialogs the user has chosen to hide with a [ ] Do not ask again checkbox, as proposed in Add a "remember my decision" checkbox to our confirmation dialogs #6641
• Which dynamic profiles have been generated, as a way to resolve user dissatisfaction (Azure Cloud Shell is readded to the profiles.json file after I remove it and restart terminal.  #3231) around profiles "coming back"
• On-screen position of the window, active session state, layout, etc. for eventual restoration (Enable Terminal to persist / restore instance settings #766, not Restore previously closed session's state (Buffer contents) #961)
• Make exit code behavior more disacoverable #10798 Add info about the exit code message the first time it happens.
• FR: Command palette commandline mode should store history in ApplicationState #11026