Sonos Wifi switching capabilities are ridiculous

Not so sure why it’s so hard. Just wire one of your Sonos devices to your new router, and let your system recognize it’s on SonosNet, then you can go in to the controller and change the data stored on each speaker by updating the network settings. Once that is done, you can remove the temporary ethernet cable, and your system will know the new data. 

Really? So you still use wires?   Also from the last Century.

No other internet source needs to do what Sonos does.  Just antiquated and ridiculous.

That’s funny.

Did you follow @Airgetlam's advice? 

It’s not ridiculous for your WiFi network to be secure. You changed the WiFi credentials when you installed the new router. Your SONOS system was using WiFi to communicate with the controllers and other SONOS units. You need to find a way to update the SONOS WiFi credentials without using the obsolete credentials. The easiest approach is to temporarily wire one SONOS unit to the network while you update the SONOS system WiFi credentials.

You’d have similar issues with other WIFi only gadgets. Your phone/pad is different because it does not need to use WiFI while you type in the new credentials. With the new credentials in place the phone/pad can sign on to the new WiFi.

Without this level of security any neighbor or a teen walk-by could easily steal all of your data, then lock you out of your system.

This would be easier if Sonos speakers where equipped with a small screen, like your printer probably is. Then the input of new network credentials could be done by way of the screen. Since Sonos device do not have a screen and need your phone to put in the new credentials the problem arises that your phone can already be on the new network while your Sonos devices ar still looking for your old network.

Sonos published the steps to take dor a new wifi here: https://support.sonos.com/en/article/connect-sonos-to-a-new-router-or-wi-fi-network

A bit more planning on your part could however also have helped. Either by using the same credentials on your new router as you had on your old router, or by have both routers connected and adding the new credentials from a phone that is still connected to the old network.

Who uses wires?  This is a wireless system.  The fact remains that any number of other systems/devices are easily switched to a new network by hitting systems and just changing the wifi.  Why should anyone have to plan for switching a network in advance? Keep both routers connected?  Add new credentials from a phone still on the old network?  Why would anyone think that would be necessary, and “plan for that in advance.”   This is, after  all, 2023, not 1995.

Its a freaking ethernet cable for 3 minutes, not 12 hours of brain surgery.  Suck it up, buttercup.

Once again: did you follow @Airgetlam's advice? If not, stop wasting our time.

So how would you hit systems on a device that has no screen? Newer Sonos devices have Bluetooth to help, older devices have do not.