> I run a single ssid dual band network ... what tends to happen is 5Ghz is effectively ignored. 2.4Ghz has better coverage, so everything wants to live there.
That hasn't been my experience at all. Checking my current network status, I've got 24 devices connected to 5GHz and only two devices (my two Nest Doorbells, for whatever reason) connected to 2.4GHz that also supports 5GHz.
In a network of 580 devices many of them tries to hang on 2.4.
My N=1 vs your N=1.
Yeah, though the anecdotes are a bit different... N=1 of a network not working was already provided by the parent, N=1 of bands working shows that it's at least possible for it to work more nicely.