In my case is does not. I dive solo often, but not exclusively. Sometimes I have buddies or solo, but around others (typical So Cal boat dives / shore dives).
That said, I tend to use my smaller pony's which while more than sufficient for me, they may not be big enough for a novice diver in a full on panic. He would run OOG 2x.
A secondary issue is in an air share I have 2 SPG's to monitor and 2 people to ascend, it's an invite to a cluster fck.
The last issue is I like my kit to be 100% consistent between dives. I am a safe diver not because I am talented or smart, but because I drill, drill and drill again.
By retaining my traditional octo on a necklace I have the best of both worlds at the cost on one extra hose.
If I do a traditional air share, I have one SPG to monitor, all is good and I still have the option of reaching down on using my pony for me to prevent 2 victims.
I do have the issue of mounting my pony and its 2nd stage so it is reachable, but not confusing for anyone. (I back mount, invert and bungy the reg to the pony).
Divers who use a larger pony or dive exclusively solo might come to different conclusions. They may think less is more and in some ways they may be correct.