Ahhh I forgot about that other New Outlook, which is still mostly old M365 Outlook with just lots of new bugs because the interface has changed and some functionality removed, it is sorta the same binary executable… so I think the list is:

• Windows Mail
• Windows Calendar
• Windows Contacts
• New Outlook (replacing the above)
• Old Outlook
• Old New Outlook (being modified Old Outlook)
• Consumer Webmail Outlook (being counterpart to New Outlook)
• Business Webmail Outlook (being counterpart to Old Outlook)
• … did I miss anything? Will there be a Business Mail New Outlook Webapp?