I hate to sound negative, but what does it offer over yeoman and the individual generators out there? If I use a Mega Boilerplate setup, I lose scaffolding post-setup stage, so what do I gain?
As a predominantly backend developer, If I just want to have a 2016-style workflow for the frontend part of my site, it's really hard!
With the boilerplate I was locked into the questionable decisions and brittle implementation of the original author. Changing anything usually broke my app and because I had taken the starter kit shortcut I didn't have the understanding of how to fix it.
What I like about the site is the visualization.
So, for instance, you know that Express is an alternative to Meteor, not a complement. And that Jade/Handlebars work with Express and are alternatives to each other.
Just having that for all the combination of names is valuable.
Basically, it helps you understand the taxonomy.