If you are writing a license, which is a legal document, then its meaning is determined not by you but by "some arbitrary judge", because you are not the only p

If you are writing a license, which is a legal document, then its meaning is determined not by you but by "some arbitrary judge", because you are not the only party bound by this license. If some other developer starts using your product based on the license that you published it under, then you don't have the right to change the license terms retroactively. Best you can do is change the license for the future releases.