My system is built around the original BRIDGE controller and the Play 5 Gen 1 and has since added Play 1’s, Play 3’s, and a Playbar - all before S2 but upgradable. In 2020, I added a Move and downgraded it to be S1 compatible. I don’t use voice command stuff and basically use the system for music. It’s worked great
I recently bought 3 more MOVES for outdoor use. Before I downgrade them all to be S1 compatible to use with my current system I want to confirm I can upgrade them back to S2 if/when my Play 5 dies or no longer functions.