It's going to be an awful lot of work, with the result that not all systems will be supported, new bugs introduced and what's the gain for the end user exactly?
Total refactoring is not a solution. It's much better to improve what we have. Perhaps with some small refactorings specifically aimed at making Vim work better for users.
# La réponse de Bram Moolenaar
Posté par Gof (site web personnel) . En réponse au journal Neovim : vim's rebirth for the 21st century. Évalué à 10.
https://groups.google.com/forum/m/#!topic/vim_dev/x0BF9Y0Uby8