How many text editors have you paid for, versus how many have you used for free?
I do think there is room for a few good paid text editors in the world, but most people won't pay directly for them, though they might use them if they are bundled ala Google Docs / O365 Word.
I have paid for Obsidian and Samsung Notes as part of buying a Samsung phone.
I also paid for a few more, e.g. Notion, but I think it's better to focus on: There's definitely value in good text editors.
They can greatly enhance your experience with a system, e.g. if Samsung Notes was amazing I'd be much more likely to stick to using a Samsung phone.