Warning, possibly unpopular opinion follows 
A significant amount of work was invested in that VSCode plugin, AFAIK more than any currently-existing Obsidian plugin. Maybe even more than all current plugins combined 
It’s quite a significant project.
But it made sense because VSCode is a code editor, and there was a significant amount of users who want a full Vim experience while still using VSCode as their IDE rather than (Neo)vim.
Is there really even a remote justification for making such a project for Obsidian? It’s a notes editor, not an IDE. And while its Vim experience leaves a lot to be desired, it is expandable* to some extent, and IMHO quite capable for a notes editor.
What might make sense is to offer such a project for CodeMirror 6, which is the future iteration for Obsidian’s underlying editor component. It is being used in many other products and has a big user base (most are online editors, but possibly enough desktop ones to make Neovim relevant).
* I’m the author of this plugin