He did mention that they were using their enterprise customers to subsidize the cost to allow them to offer Teams for free, so maybe if they get enough enterprise customers using GitHub Packages we might see unlimited free private packages for individuals/teams. I don't see a ton of value for GitHub/MS in that situation, but maybe.
See Nat's original words about the acquisition: https://github.blog/2020-03-16-npm-is-joining-github/
GitHub Teams get 2GB of free private package storage (unlimated for public packages) https://github.com/features/packages
He did mention that they were using their enterprise customers to subsidize the cost to allow them to offer Teams for free, so maybe if they get enough enterprise customers using GitHub Packages we might see unlimited free private packages for individuals/teams. I don't see a ton of value for GitHub/MS in that situation, but maybe.