Earlier quoted context omitted.
> The AGPL restricts use; it is an EULA: end-user license agreement. The antithesis of free software. This is a common misconception about Free software. It's not about freedom of its users or authors, it's freedom of the actual code to be available for others. For example, MIT license allows users to take the code and modify it without releasing modifications. This traps the new version of the software, possibly for…
Firstly, GPLed programs with proprietary modifications can easily be trapped inside single organizations. The original MIT-licensed program continues to exist and be available regardless of the proprietary versions and embeddings. A copyleft license just asserts, using copyright power, that such things should not exist. MIT and BSD licenses just allow certain works to legally exist that copyleft advocates think shoul…
> A copyleft license just asserts, using copyright power, that such things should not exist.
Well, a copyleft license asserts that proprietary versions and embeddings of the licensed software should not exist. GPL software doesn't assert anything about the existence of BSD-licensed software. Or at least, not unless you link them together into one thing.
It is true that rms would prefer that such works not exist. (Or that's how he felt originally, at least.) But the GPL is silent on the issue, as it has to be. There's no clause saying "the author promises not to release any software with a non-copyleft license, nor to name a child Dorothy, nor to eat the flesh of an aquatic mammal."