Any remaining Windows 10 users in 2025?

Yes. Windows 10 22H2 as some of the old apps not working well in windows 11.

I still use it on one of my old notebooks. 

Microsoft's support for Windows 10 ended in 2023, meaning no more security updates or technical support.  This makes it significantly less secure and less desirable for users.

As of 2025, it is unlikely that there are many remaining Windows 10 users, but some may still be using it for various reasons. These could include enterprise environments with slow hardware upgrades, users who prefer familiar interfaces, or those in regions with limited access to newer hardware or software updates.