I think "simplicity" is probably putting it mildly. Getting Unity up and running is actually a pretty big undertaking (lots of hoops to jump through including a Java install 💩 )! And then there is a learning curve just to make something worthwhile to look at. I finally gave up because I just did not want to put in the time to learn the tool, which in my opinion is over-engineered.
It would be great if the Decentraland devs looked at alternatives like A-Frame, an open source and extremely easy to use WebVR framework. Setting up an A-Frame scene is a breeze: it's just like HTML. Anyone with a modern web browser can build a scene and get it up and running quickly (literally 10-15 lines of HTML in a CodePen or Glitch for example).
Maybe they have already been looking at it, but if not, I hope @eordano @maraoz & al give this a consideration. An open source project like Decentraland should be embracing open source VR tools, especially if they make it easier for the early adopters like us to put content into Decentraland. It makes sense to have the VR layer of Decentraland built on top of an open source and very popular WebVR framework.