I've been a long time user of Sonos speakers (15+ years) and have always used the hub that out when Sonos first started.
I was always under the impression that that hub created a special network for the all of the speakers to connect to to keep WiFi traffic down on your normal WiFi traffic and to make Sonos more reliable.
Fast forward to today when I've upgrade all of my speakers to the new Fives. I purchased the Boost to help with my system. I do have one Sonos Play 1 still in use in the house.
I notice that it seems like my speakers are connected directly to my WiFi and not the Boost as I can see them on my routers device page.
Is this Boost even needed any longer as nothing seems to be connected to it.