I have been tinkering with ExtJS for a month now, and have really fallen in love with it. You’ll never want to code an html table again once you’ve worked with ExtJS. The library had been dual-licensed as LGPL or commercial. LGPL is much less restrictive than GPL, and it drew a lot of folks in to ExtJS. Without warning, on Monday, the license for ExtJS was changed to regular GPL in a point release. To say the community around ExtJS is a bit agitated would be an understatement.
This change has actually caused me to rethink my opinions about the GPL. I considered it a viral license before, based on the fact it infects everything it touches. Most other professional software developers share the same opinion. But now, seeing what it has done to ExtJS in less than a week, I have decided the GPL is a cancerous license – it doesn’t just infect the host, it kills it.
ExtJS got mindshare by having the LGPL license. Developers were willing to try it, evangelize it, and participate in the community. They felt a sense of ownership in contributing to it and helping the new users on the forums. The surprise change has destroyed that goodwill and the new license makes it very difficult for anyone to take an interest in it. Most companies are strongly anti-GPL, for good reason, so corporate developers won’t be allowed to play with it. And no company is going to go out and buy commercial licenses on blind faith with such a small, unproven software shop.
Now that ExtJS is licensed as GPL instead of LGPL, I expect to see the community evaporate. That leaves ExtJS competing as a purely commercial endeavor against the likes of Microsoft Silverlight and Adobe Flex. The customer-business relationship will be a lot harsher for ExtJS than one of a community-supported open source project. They will become slaves to their biggest clients, effectively ignoring the community that got them the mindshare to begin with.
I can appreciate the ExtJS folks wanting to make money with the work they have done. The dream job of every software developer is to be paid well to work with the technologies you enjoy. But switching to GPL was the wrong way to approach it. Like cancer, the GPL is going to kill the host.