The race to replace Redis

I'm not disagreeing with the point you are making, but it seems to me when it comes to copyright nothing is obvious. In fact the definition of "derivative work" applied to software is downright opaque.

The outstanding illustration to me is how badly the AGPL is viewed. If you believe it's detractors it infects everything. According to Cyberax if you believe corporate lawyers he deals with it's pure poison. Yet it's text identical to the GPL in every place bar one, and that place doesn't deal with the definition of derivative work.

In fact given Cyberax's comments on the attitude of Amazon's corporate lawyers to the AGPL I'm surprised Redis didn't consider it to be a good enough AWS repellent. But perhaps they aren't targeting just AWS.