No, it was for him. Since Avast dropped support for windows 8.* and below, they won't get more definitions updates.
I think you're confusing version of program and version of Windows.
The support for Avast versions 5 - 8 (released in years 2010 - 2013) was dropped, yes.
In Avast version 19, the support for Windows XP and Vista was dropped - i.e. Avast 19/20 cannot be installed on those operating systems.
However, the latest Avast 20.3 still supports Windows 7 and higher.