Earlier quoted context omitted.
So they would like you to believe they renamed Office 365 so you overpurchase: Office 365, which is just the office suite and email, is a separate set of SKUs from Microsoft 365, which also includes Windows Enterprise, Entra, etc.
There really is nothing officially called "Office 365" anymore, or "Office" in general. You're right that they have some (confusing) distinctions between Microsoft 365 and Microsoft 365 Copilot. For example, indeed you can purchase a "Microsoft 365" subscription that doesn't give you the enterprise AI features - but the app your employees will install to get access to Excel and Word is still called "Microsoft 365 Cop…
https://www.microsoft.com/en-us/microsoft-365/enterprise/com...
Office 365 E3 is sold for $20.75 a month, Microsoft 365 E3 is sold for $33.75 a month.
And yes, confusingly, Microsoft also sells Microsoft 365 Apps for Enterprise, which you'd think would be closer to the Microsoft 365 bundle... but it's not, it's a stripped down version of the Office 365 one. None of it makes sense, but "Office 365" is still very much, as I said previously, a whole set of subscription packages sold today, separate from Microsoft 365 ones.
I also recommend this spreadsheet if you need to truly break your brain: https://cdn-dynmedia-1.microsoft.com/is/content/microsoftcor...