Exchange Server is effectively dead mid October too. Technically they have Exchange Server SE as an option, but it’s clearly not how they want people using Exchange anymore. They don’t even want hybrid setups.

Which is extra annoying because if you have Azure AD (I guess it’s Entra ID now) syncing from an on prem AD forest, half of the mailbox management shit in Exchange Online just doesn’t work and forces you to make the changes on-prem anyway.