I could never use Emacs without vim keybindings, but I don't need to install Spacemacs to get that. It's as easy as
package-install evil
package-install evil-commentary
package-install evil-leader
package-install evil-org
package-install evil-surround (require 'evil)
(require 'evil-matchit)
(require 'evil-surround)
(evil-mode 1)
(global-evil-matchit-mode 1)
(global-evil-surround-mode 1)
(evil-commentary-mode)
judge for yourself whether this is too much work to paste into your .emacsThe biggie to me is discoverability, with it's pneumonic key combos, and integrating with packages like helm.
Even with evil, the vim semantics are often violated in special buffers, making for a rather disjointed experience. Spacemacs also does a lot to smooth out a lot of those problems.
Similar slow startup. Majority impact on spacemacs startup is the regular search for package updates. Without it the startup-time is relative tame, though there is of course some place for improvment if you aim for <1 sec-startups.
It has an insane startup speed! I tried once and it opened within a second. I'm not an evil user myself, so don't know about the vim compatibility.
If you are interested in making the startup faster, check https://github.com/hlissner/doom-emacs/wiki/FAQ#how-is-dooms... from the same author