Who has clients that will be affected by MC1023294, aka "New Exchange Online Tenant Outbound Email Limits"?

Maybe this is essentially a client size and industry question but our most email heavy client only pushes out ~600-~800 emails a day, and most of that is semi automated shipping updates from their warehouse.

Who's going to need to plan around the 10K outbound send limit for Microsoft 365 to be implemented in April? I'm not envious. :)