Meursault wrote on Nov 7
th, 2015 at 5:39pm:
Wait, from
startup?! That info will be stale by the time they open the LFM so they have to refresh it anyway, they save nothing. And it costs at least one and possibly two additional round trips to the server.
And they have to pay that additional overhead over and over again, because as people log off and new ones log on, the local copy of the Who list will be stale, and they'll again have to download the whole 500 long list. Or maintain and transmit concurrency information so they can download only change sets, but that's a huge amount of overhead to save downloading 50 names

That right there is a reason to avoid a server merge, that's painful with 500 people online, that delay will really be apparent if they have 2-3k users to download every time somebody wants to checks the LFMs.
They mumbled something about reducing the load on the servers, but to my mind it was simply about giving the appearance of faster startup times.
From my perspective it is akin to putting delays on your startup programs, so non-essential crap starts 30 secs later.
For me the Lfm and who list are not very high priority so I'm ok with it not loading if I don't need it.
Running off a high end PC with SSD, it doesn't make much difference, but my lower end slave PC's do notice the faster startup.
Now whether it makes any difference to the game or server loads I don't know.