Not sure I agree with your certainty, as all of my older devices are still working without issue. I suspect more of a local network issue. Not much detail to go on, I suspect a duplicate IP address issue, since you’ve tied it to an update.
Try unplugging all your Sonos devices from power, then reboot your router. Give it a couple of minutes before plugging back in your Sonos.
If this doesn’t resolve the issue, I would recommend that you submit a system diagnostic within 10 minutes of experiencing this problem, and call Sonos Support to discuss it. But don’t post the resulting diagnostic number here, they get sensitive about GDPR.
There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.
When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.
