Customer-management-framework - mariadb vs mysql

We have a mysql setup (and are considering using AWS’s Aurora for availability across multiple Availability Zones). However, reading the documentation it says MariaDB is required.
Is the CMF completely not usable with mysql OR are there only certain parts not available?

From

https://github.com/pimcore/customer-data-framework/blob/master/doc/02_Installation.md

Blockquote
Please note that Customer Management Framework requires MariaDB as database. It will not work with default MySQL. MariaDB is used to save activities with the MariaDB Dynamic Columns feature: https://mariadb.com/kb/en/library/dynamic-columns/

Hi,
there is already an alternative activity store available to support mysql.

To do so, just overwrite the default activity store as follows:

    # overwrite activity store to mysql
    CustomerManagementFrameworkBundle\ActivityStore\ActivityStoreInterface:
        class: CustomerManagementFrameworkBundle\ActivityStore\MySQL

BR
Christian

I’ve done above in services.yml
I haven’t used activities yet but will keep testing.
Appreciate your help Christian.