Introduction
You could consider space-vim as a mere Plug 'foo' list, apparently with much of my own personal taste.
Why you should use space-vim?
If I have seen further than others, it is by standing upon the shoulders of giants. -- Newton
My understanding is to always stand upon the shoulders of giants when you try to master something new.
At the every beginning, I tried ma6174/vim(deprecated now). It looks less modern today, but it's good enough for me at that time. I really appreciate his effort, which helped me survive in the vim world. Afterwards I studied spf13-vim a lot and start to write my config from zero. You could still see lots of elements from spf13-vim from the branch vundle. Much later, I replaced Vundle with vim-plug(see the branch vim-plug). After I had some experience with spacemacs and dived into the design of vim-plug, I rebuild space-vim based on the philosophy of spacemacs and vim-plug.
Without these giants, space-vim will never be born. I hope space-vim could become one of your giants as well.
Why you shouldn't use space-vim?
You definitely ought to abandon it when you grow up. A real vimmer never use anyone else's vimrc. With enough knowledge, you should write your own config from scratch, do things exactly what you want.
