FWIW, they said nothing about shared drives, so all of the businesses that were/are going to need unlimited storage will be able to use shared drives for sharing files with their team.
I have a unique perspective with having a GSuite for Nonprofits organization, and even though we technically have 30GB of storage per user[0]:
> Unlimited users with 30 GB cloud storage each
We also have shared drives which don't have a (number of bytes-based) storage limit, so I can't say exactly what happens to new Workspace Business tier orgs but I don't imagine shared drives will have a total storage limit.
https://support.google.com/a/answer/7212025?hl=en