Just to clarify... EVERYONE uses individual bottles... if the beer is in a bottle
Whatever the beer is to be served in or stored in, the final step of brewing is done in. Cans. Bottles -12 oz, 22 oz, 16oz. 64 oz Growlers / half gallon jugs. Kegs.
So if I'm making a Keg, my final step is a keg. My primary and secondary fermenter are these GIANT (6 or 7 gallon?) glass carboys. Microbrewies use small vats the size of a room and Budweiser? Well, I imagine they just have TONS of those vats and they're even bigger. That's fine for primary and secondary fermentation. However, the final step puts pressure on the liquid. If Budweiser is making bud and the final stage is a can, the final step is done inside the can. It has to be.
For the homebrewer like me, I like to use a 32 oz glass bottle with a grolsch cap. If I know the drinking habits of my end-user and I want to save time, I can do this
but its still a bottle... just a bigger bottle
and grolschs are way easier to open than standard bottle caps but they're not very cost efficient on small bottles. If I'm bottling a 7 gallon batch into individual bottles, I prefer to recruit some help but I'm also not a brewer by trade like Mac. If that's all he does, he could handle it just fine.