Andyross
I’ve looked at multiple sources, including a couple of different ones from Microsoft.
I’ve seen conflicting answers as to the Defender (AV) updates…
One possibility is that MS management at first did intend to cut them off but then relented.
An easy solution is to just seek to do manual AV updates after October 14…
I’ve gone ahead though with the Free version of BitDefender as linked earlier.
It’s actually rather nice, and one account covers 3 machines, and optional free VPN.