Actually yes!

The Unicode text handling in Windows has been significantly revamped from the APIs listed in these articles, as has the text rendering APIs which now go through DirectX.

You can still use Uniscribe in Windows 10 but as you said it has been superseded by DirectWrite (used in Microsoft Word, WPF, etc).

Yep, you can definitely still use it all, just like you can continue to use the even older APIs too - hooray for backwards compatibility.

Just pointing out that the technology for Notepad has actually changed and improved since 2005.

It's the house style to add the year to titles from previous years.