The text includes this specification: "The Foundation promises that all distribution of the Work, or of any work "based on the Work," that takes place under the

The text includes this specification: "The Foundation promises that all distribution of the Work, or of any work "based on the Work," that takes place under the control of the Foundation or its assignees, shall be on terms that explicitly and perpetually permit anyone possessing a copy of the work to which the terms apply, and possessing accurate notice of these terms, to redistribute copies of the work to anyone on the same terms". So you're right, in principle the FSF could apply the AGPL to every software they have copyright assigned for, but they also have to be careful not to breach the terms of their own contract. As to the SSPL and similar license, the FSF hasn't publicly commented on it but they also don't include it in their list of approved free software licenses, so we know that the FSF doesn't really think the line could/should be drawn far from the GPLv3 and AGPL.