Guilds that are ALREADY established can and will do well in BG3. There will be a HUGE D&D community and a huge MMO community. And those environments LOVE social outlets that a guild can provide. Many who play or used to play MMOS are LONGTIME RPG players. Myself? I played all the "gold box" SSI games. Pool of Radiance, Dark Queen of Krynn, Curse of Azure Bonds on a Commodore 64, 128 and Amiga. I played D&D staring in 1976 -- -- White Box. So i know the reality of both MMO and RPG worlds -- on a computer and tabletop

No need to comment that guilds will not form here or need to form here. They will. And because they can be fun social environments that give direction, game tips, make friends and can fill parties rather easily, they should do quite well!!
Not to mention if you are an established guild already... what a great form of entertainment to provide your current guildies who may need a break away from their "A game" and are just looking for something else to do for awhile WITH THE friends they've made in your guild already. Joining a good guild of like minded individuals is a great tool when you are playing games as a temporary escape from reality.
Let's please give guilds a chance to form and recruit if they would like to expand their current guild, or launch a new one and make friends.