MicrosoftI see that you're worried about this Pavel Otych. I think it's not all doom and gloom though, as major parts of what's delivered by Purview is already present in M365 E3 and/o M365BP.
https://docs.microsoft.com/en-us/office365/servicedescriptions/microsoft-365-service-descriptions/microsoft-365-tenantlevel-services-licensing-guidance/microsoft-365-security-compliance-licensing-guidance#which-licenses-provide-the-rights-for-a-user-to-benefit-from-the-service-18 (except for DLP for Teams which is an E5 feature and Endpoint DLP, which is a Microsoft Defender for Endpoint P2 feature)
https://docs.microsoft.com/en-us/office365/servicedescriptions/microsoft-365-service-descriptions/microsoft-365-tenantlevel-services-licensing-guidance/microsoft-365-security-compliance-licensing-guidance#microsoft-purview-information-protection-sensitivity-labeling (manual labeling, automation requires E5)
https://docs.microsoft.com/en-us/office365/servicedescriptions/microsoft-365-service-descriptions/microsoft-365-tenantlevel-services-licensing-guidance/microsoft-365-security-compliance-licensing-guidance#microsoft-purview-data-lifecycle-management (automation requires E5)
