Security updates for Windows 10 are currently set to end in 2025. However, there is a strong possibility Microsoft will continue to support it, given that so much hardware cannot be directly upgraded to Windows 11 (it can be done, but not officially).

You’re also saying that as if an up to date Windows 11 installation is the pinnacle of security. Last I checked (albeit I can’t remember the name of it), there was a very low level way of hacking out a Windows user’s password, one that Microsoft has no easy way of addressing. This is among any number of other zero days that are prevalent in such a widespread OS.