I was just wondering today why the BR format has taken over in recent years and I can't really come up with a technical reason for it. Red orchestra had 64 player pvp matches back in 2006 and I think Arma had similar sized game modes in that era too. I could see a BR mod for either of those, but it didn't happen (or at least take off). Maybe there's something I'm missing, but it seems feasible.
I think the gaming world just really latches onto tends. A few years it was survival/crafting games, before that RPG's. Good luck figuring out what's next!
From personal observation and experience, I believe the BR game mode got some traction after the first Hunger Games movie released. After that movie released, I remember all sorts of "Hunger Games" Minecraft maps appearing online. I downloaded, played and hosted a handful of these Hunger Games "last man standing" maps for family and friends to play.
After a few weeks of that, the game format grew stale, and I stopped playing HG maps. Then a few years later a whole bunch of BR games hit the scene and all I could think of was how similar they were to the Hunger Games Minecraft maps.
Interesting! I remember playing DotA as a custom map on Warcraft 3, then being amazed to see the League of Legends and DotA2 communities grow so large. I had no idea that the battle royal games started in Minecraft. That's fun to know.
The modern Battle Royale mode evolved from multiplayer mods for Minecraft and then ARMA made shortly after the 2012 movie Hunger Games which provided the essential ideas all together (elimination, lots of players, must explore a huge map for items).
I think Minecraft can't be overrated as a vehicle for experimentation in multiplayer modes. Not only did the game have a huge modding and multiplayer community and have support for large player counts and maps, but it's unusually easy to create for and the game itself has no built-in structured competitive multiplayer gametypes, which means there's tons of demand for people to make gametypes from scratch and there's no built-in code for how matches work that needs to be worked around for new ideas to be attempted. Many other online games have specific ideas of how matches work built-in that reduce the demand for brand new gametypes and could make implementing a gametype where matches work differently daunting.
I think the gaming world just really latches onto tends. A few years it was survival/crafting games, before that RPG's. Good luck figuring out what's next!