Wrong. Recycle Mode
Sonos deployed a software update to their Play: 5 1st edition units which were VERY capable and it bricked their units.
This had nothing do do with any sale at all, why would ANY company of any internet connected device roll out an update to BRICK their hardware BEFORE the customer brings it in? Many changed their minds ~ sorry that baffles common sense to me.
When my perfectly fine Play 5 gets bricked, will it still function as a "dumb" speaker?
en.community.sonos.com
Just about every upgrade process I've seen is bring it in, then company does with it. Send out a coupon that is ONLY redeemable at confirmation of receiving the product.
See how easy the new process is for Sonos?!