> It seriously limits amount of people that can use your library, and hopefully you are open sourcing a library because you want to help as many people as possible.
This statement ignores the myriad alternative reasons, both personal and altruistic, why someone may wish to provide something as open source; in particular, it entirely dismisses as apparently-not-even-worthy-of-thought the actual arguments made those who use GPL-based licenses that concentrating on helping first-order consumers at the expense of those people further down the chain (the potential users of derivative software built by developers who are building on your work; especially and even specifically when your original software offered fairly unique and enabling functionality, as is described by the FSF as the situation where the GPL may be warranted for library use) seems like a strange and self-defeating bet to make about what the influence of your code will be, even when the goal is solely to "help as many people as possible".
This statement ignores the myriad alternative reasons, both personal and altruistic, why someone may wish to provide something as open source; in particular, it entirely dismisses as apparently-not-even-worthy-of-thought the actual arguments made those who use GPL-based licenses that concentrating on helping first-order consumers at the expense of those people further down the chain (the potential users of derivative software built by developers who are building on your work; especially and even specifically when your original software offered fairly unique and enabling functionality, as is described by the FSF as the situation where the GPL may be warranted for library use) seems like a strange and self-defeating bet to make about what the influence of your code will be, even when the goal is solely to "help as many people as possible".