I’ve also seen plenty of new editors rise and fall in the past 20 years - Komodo, TextMate, Sublime Text, Atom, etc.
Two of those editors are Mac-only, and only one editor is open source. I suspect if Sublime had become open (and cross-platform), it would be significant "player" in the editor wars. Atom has mostly died on the vine, thanks to VS Code. That doesn't negate any of the author's points about Emacs, but, aside from VS Code (and, I guess, Atom), there have been few efforts to create a performant[0] cross-platform, IDE-like editor.
[0] Insert comments about VS Code's performance here.
That's a fair point, although I can think of examples in the IDE reals as well - e.g. in the world of Java Eclipse and NetBeans were popular (and open-source), but gradually IntelliJ IDEA dominated them for various reasons. I also remember all the Borland tools (super popular in the 90s) that have mostly disappeared by now. I definitely think that open-source projects are more likely to survive long-term, but it's not like they don't fail.
Btw, I think TextMate is open-source these days as well.
Two of those editors are Mac-only, and only one editor is open source. I suspect if Sublime had become open (and cross-platform), it would be significant "player" in the editor wars. Atom has mostly died on the vine, thanks to VS Code. That doesn't negate any of the author's points about Emacs, but, aside from VS Code (and, I guess, Atom), there have been few efforts to create a performant[0] cross-platform, IDE-like editor.
[0] Insert comments about VS Code's performance here.