You can continue using normal Windows 10 if you have a Microsoft account attached to it. They give you the option to sign up for free extended updates (until 2027).
Eh, I’m just going to keep using Windows 10 without the account. I’m sure as an ethical company Microsoft will at least distribute patches for any security issues that were present on the day I bought the OS, especially because they are still developing the patches.
...which is exactly what the featured article is about. But 2032 > 2027, so I have to assume the person you replied to already knew that and was providing additional advice.
My guess would be because too many users held out with Win10, are not really a potential income stream, and MS would rather keep them MS customers than Linux or Mac (their next machine might be a Neo rather than Win11 these days).
The cost to Microsoft is essentially zero if they ate already committed to these security updates (and they are, at least for the LTSC branch and some government contracts)