Nobody will notice end of support for Windows 10. Why would they? Nobody noticed end of support for Windows 7, either, and it's still up and running in many places where it really shouldn't.
End users don't give a crap about security updates and as long as users don't bump into a lack of third party driver they won't even notice a difference. And yeah, like every other time they will eventually update to the current version once more practical issues crop up. 10 to 11 isn't even close to the harshest upgrade path MS has deployed.