@lucy @mangeurdenuage @zero Also Free Software Definition explicitly states:
> In order for these freedoms to be real, they must be permanent and irrevocable as long as you do nothing wrong; if the developer of the software has the power to revoke the license, or retroactively add restrictions to its terms, without your doing anything wrong to give cause, the software is not free.

And MIT is an FSF-approved license: https://www.gnu.org/licenses/license-list.html#Expat / https://www.gnu.org/licenses/license-list.html#X11License (difference between the two typically doesn't matters)

I doubt the FSF has failed to evaluate a license that's about as old as the GNU project.