Emacs's regular clipboard is the "kill ring" which also allows you to retrieve any previously cut/copied text. It also has "registers" where you can store and retrieve snippets of text, which can be considered clipboards when used for this purpose. Registers can be referenced by any character you can type on your keyboard, including control characters like ^D.
This totals... a lot of clipboards.
I don't think that's a good idea. Pretty much all interaction with Emacs is mediated through keybinds. There is no distinction between shortcuts and fundamental behavior. Even ordinary typing is done by having each character on your keyboard bound to
self-insert-command
. Perhaps there is some way to nuke the global keymap, but then you're left with literally nothing. Besides, this would not prevent various modes from adding their own keys anyway.You should consider whether Emacs keybinds are actually in the way enough to be bothersome. You can also
keymap-global-unset
(orkeymap-unset
) individual bindings that you find problematic. I'd also consider delving into the Spacemacs code to see how they implement their "vi only mode."