Will life-support systems have limits to how many people they can support?
TL;DRYes, life support is limited: gas mass is tracked per room, with producers and players consuming it, so you can use up the air, depending on room size, producers and helmet use.
Oh, yes. The plan is how it works: we have rooms. Each room has a volume. Each volume can hold X amount of gas. We track the mass of gas in every single room. So we have producers which produce oxygen for you and we have consumers. In this case, it's the players. So yes, technically you can breathe out all the air and die horribly.
And I imagine that the next question that anybody's going to have is how long before that happens. But I imagine that has to change depending on the ship, the equipment, the size of the room. There's a number of factors that's going to determine that, right?
Yes, naturally. It depends on the size of the room. It depends on oxygen producers that we have on board. It also depends on: are you wearing a helmet? Because if you are, you're not breathing atmosphere from the room. So you're using internal oxygen supply.