What really pisses me off about this S1 S2 thing is that it is absolutely possible to make later technology work with the older technology. The new units have more memory and faster processors so can easily deal with the old requirement.
I recently purchased a sonos roam, what a load of bollocks to set it up, you need to set up a new system and your old kit won't work.
it is so easy for sonos to provide the old functionality on new tech they just want to squeeze their customers.