Yes I know that servers are run by multiple machines you fucktard.
Then say stupid crap as "get more servers".
There's still a difference between having a bunch of instances of the same zone that people switch between and having separate servers.
BDO have instances but you dont move across then unless for some reason capacity is reached and you get booted out even if I think that only happened to me 1 or 2 due to heavy load as the server tried to move people across to prevent the entire thing to crash down.
And this is the problem, you are taking Cryptic Engine model were each zone have a cap limited and its entirely separated from the others and then you have TERA (not to use BDO again) that uses EU3 that connects areas without loading, I suspect there were some "loading" but you could move across maps without having to use the fast travel way.
Granted it been years now but I dont even recall TERA having instances outside dungeons.
If players are separated into servers I don't have to check what instance of a zone I'm in and try to figure out how to get into the same one as my friends.
Again, you are using Cryptic Engine model that is fairly limited and by servers you basically segregating players by server ... BDO used to have 3 "main servers" but merged due to the population being too spread out and this is a common occurrence with MMOs were after release and the tourists leave, they suddenly end up with "servers" that have a very diminished population to the point its a problem and thus they get merged, SEA usually gets fuck as they are thrown into the NA server if they had a regional one.
Even if I get what you are saying, the fact is instances seem to handle things better that separate servers as otherwise they would not merge servers.
That or you just really wanted to try to sound smart and talk down to someone.
Point being, instance exists for reasons and you trying to say the only MMO that should exist is one with no dungeons and just fields ... you completely willing ignore all the issues that come because even with a field if you create it with the idea there will be 1000 people there it will have too many mobs when there are only 100 people there and the opposite applies, too many people leads to not enough mobs and I am sure you going to go about PvP and fight for resources, I heard that in BDO as a excuse for the shitty XP-kill balance that existence in zones leading to everyone fucking go to the exact same zone with the others that were of the same levels being deserted due to shitty payout.
In the end you want a very specific type of MMO for you and your fellow minded friends but you are also saying that is the only type of MMO that should be made, one that ignores co-op and its just a "free for all PvP Grindfest" as anything else is "single player".
Also I want to point this out, if ... if they could do 100k concurrent players in the same instance I bet they would do that and advertise the crap out of it because thats impressive, they dont because simply they cannot handle so many connections, you said something about "shitty computers" but all your computer does is rendering, modern MMO dont made calculations on the client because thats open to abuse by cheats but server side so thats not the problem despite you trying to blame people from not having a i10 with a RTXS900Pi as if that matters, perhaps it matters more you live in a place with a shitty internet infrastructure like New York, instances are ways to handle the problems of having so many connections as well having to make every single calculation that matters because it cannot be done client side. Even so there would still be reasons to run instances for cases like Dungeons or Housing unless you think what happened with ArchAge housing (as that one wasnt instanced) is the right way to handle things.