My intention is not only to show how to use Vim, but also list other programs often used in combination with Vim, explaining typical issues people encounter, historical facts, internal details, easter eggs, and so on.
So, yes, "all things Vim". :-)
It will keep growing, but I'll split it up so each section gets its own file.
As the author of the plugin I posted this, because I think that vim-signify (or just Sy) 1.9 is feature-complete in regard to VCS handling. Beginning with 2.0 new features will be added, like signs for marks, breakpoints etc.
Yes, I knew about vim-gitgutter before, I even contributed to it. But in the end I just didn't like the codebase and started my own plugin. And because I like programming VimL.
The main difference is probably the support for other DVCS. Moreover, execution speed and high configurability are two of the design goals.