I use many open source libraries and contribute to some of them. I NEVER, EVER use anything GPL-lisenced, not even when I could. LGPL is the minimum, GPL just creates mindless boundary conditions and it is really good to see that many library creators are moving away from this madness.

The most used and successful libraries today have their license LGPL-style, giving a chance also for commercial usage usually brings back contribution and feedback from that side. And it is really nothing taken away from non-commercial users, quite opposite, win-win for everybody.

Maybe GPL is ok, when it is about a full, working application, but it is a total fIasco if applied to a library.