I'm so tired of hearing this argument. The amount of revenue generated by customers who use only Microsoft Teams without an Office365 subscription is exactly $0 [1]. MS gives you exactly 2 options to get teams:

1. Free

2. Included as part of Office365.

Teams is currently eatings Slacks lunch, but the lunch was paid for by a corporate IT guy who switched to Office365 so he could lay off some IT admins and save some money compared to managing an on-premise Exchange server.

[1](https://www.microsoft.com/en-us/microsoft-365/microsoft-team...)