Windows 10 EULA and Support Life Cycle

[Corrine]

Two articles by Ed Bott explaining the Windows 10 License Terms and Support Life Cycle: 

• Microsoft releases new license terms for Windows 10: Biggest surprise? No gotchas
  
• Microsoft commits to 10-year support lifecycle for Windows 10
  

From  Windows lifecycle fact sheet:

Windows 10, released in July 2015 **
End of mainstream support:  October 13, 2020
End of extended support:  End of extended support

** Updates are cumulative, with each update built upon all of the updates that preceded it. A device needs to install the latest update to remain supported. Updates may include new features, fixes (security and/or non-security), or a combination of both. Not all features in an update will work on all devices. A device may not be able to receive updates if the device hardware is incompatible, lacking current drivers, or otherwise outside of the Original Equipment Manufacturer's ("OEM") support period. Update availability may vary, for example by country, region, network connectivity, mobile operator (e.g., for cellular-capable devices), or hardware capabilities (including, e.g., free disk space).

[Pete!]

.... Not all features in an update will work on all devices. A device may not be able to receive updates if the device hardware is incompatible, lacking current drivers, or otherwise outside of the Original Equipment Manufacturer's ("OEM") support period.....

There's the "gotcha". One advanced update, can take a whole generation of older machines, out of the loop. You can't just skip a problematic "new features" update and continue receiving the less complicated security updates. 

I wonder if how many computers that are in service today, will continue to receive support for the entire "extended life cycle".