I'm no expert, but I believe the rationale is to simplify relicensing (GPLv2 -> GPLv3, for instance). I also think the papers disallow dual licensing the projec

I'm no expert, but I believe the rationale is to simplify relicensing (GPLv2 -> GPLv3, for instance). I also think the papers disallow dual licensing the project with a proprietary license. There's more discussion here: https://news.ycombinator.com/item?id=11953703 https://news.ycombinator.com/item?id=11953703