"Important: The Software Assurance 24x7 Problem Resolution Support benefit is retired as of February 1, 2023. Starting on February 1, 2023, Software Assurance incidents won’t be usable or allocated." (1)
BUT... see the additional benefits for SCE customers
With License Mobility through Software Assurance, you can deploy certain server application licenses purchased under your Volume Licensing agreement in an Authorized Mobility Partner’s datacenter. (2)
License Mobility through Software Assurance allows you to move SQL Server licenses between servers within the same server farm without waiting 90 days.
Server farm refers to a group of servers under common administrative control (i.e. same legal entity, same IT operation), in up to two data centers in time zones that are no more than four hours apart, that share resources and are managed as a single logical unit.