[goldfeld]

Right after the tightly thought out keybindings, I think the greatest value offering in vim is the documentation. It's extremely comprehensive, and being fairly conversant in Vimscript I know I could develop plugins without internet at all, looking up the API with :help (I've only recently acquired the habit and it feels great.) So if vim came out with such a mature, thorough documentation, it would not only be well worth the 100 euro, but I think it would have little problem finding at least a cult following out of thin air. Writing those docs are arguably as hard as writing vim itself, perhaps harder because it isn't as challenging and requires pure dilligence and thoroughness. It's like writing a full book to ship along with the software.