Feels like clickbait to me. There were lots of OSes.
Things like GEM, OS/2, Next, BeOS, GeOS, MSX, ... they didn't succeed and I'm sure you can write some clickbait article about why with conspiratorial anecdotes.
The title is certainly clickbait-y. But the content is still interesting. And not sloppy.
The title is certainly clickbait-y. But the content is still interesting. And not sloppy.