I wouldn't call it "winning" but you do need a big piece of the userbase to be relevant (when we are talking about text editors that are 90% plugins and 10% core, like Atom, Sublime, VsCode, Vim, Emacs...)
When I write code in a language I don't find the best language plugin for language X in "my editor". Instead I search for "which editor has the best plugin for language X". And in most of the cases, the difference between different editors is much smaller than the difference in quality between language plugins.
So basically, unless an editor "wins" (say becomes one of the top 5 most used) then there will be very few plugins for that text editor for the next thing that you need a plugin for.
(And let's hope a non-electron editor is the next to gain that momentum.)