"We need more desktop environments" - Nooo, absolutely not. You need one or maybe two good ones, and it can have tiling as a feature or at worst plugin. The fragmentation and lack of key features and stability testing as a result is already a major reason for people not to adopt Linux desktops. And even if we don't consolidate, there is already an idiotic amount of just different tiling desktop environments, let alone all desktop environments. What on earth do you want even more for? Just add features to existing ones, so that everybody benefits. Competition isn't really needed in open source, since you can just add all of the things to one shared solution. Imagine if everybody suggested making a brand new kernel for each combination of hardware, or the likes.