The free upgrade "ended" 4 years ago, but by all accounts I've seen, it seems that provided your hardware is compatible, the official Microsoft Download Tool to create the Windows 10 installation media still works, and that upgrades for legitimate, activated copies of Windows 7, 8, 8.1 are still working. Reports as late as Sept 2020 indicate that users are still getting free, activated upgrades to Windows 10 using Microsoft's official update path.
I'm not suggesting that people should do so, of course. Heaven forbid that I should get in the way of a good pout/rant about the evils of the latest version of the Windows OS.
