Hearing about Viper reminds me about the times where I was just starting to use Emacs, about 10 years ago! Fond memories :)
Since then, Evil-mode has effectively superseded it.
I wish I had learnt vim-like editing a long time ago, as Vim-bindings seem to be mostly well-maintained in every editor.
Emacs-bindings are also in most editors, but it's not as useful since people (most people? in any case, me) usually customize the default shortcuts quite a bit. And less manpower to maintain them.
Since then, Evil-mode has effectively superseded it. I wish I had learnt vim-like editing a long time ago, as Vim-bindings seem to be mostly well-maintained in every editor.
Emacs-bindings are also in most editors, but it's not as useful since people (most people? in any case, me) usually customize the default shortcuts quite a bit. And less manpower to maintain them.