> In general there’s no way to keep everything in your head
I imagine everyone's capacity is different, but you wouldn't want anyone with a low capacity on your team, so that's moot. Frankly, there is no need to go beyond what you can keep in your head, unless your personal capacity is naturally limited I guess, because as soon as you progress in some way the world has changed and you have to reevaluate everything anyway, so there was no reason to worry about the stuff you can't focus on to begin with.
I imagine everyone's capacity is different, but you wouldn't want anyone with a low capacity on your team, so that's moot. Frankly, there is no need to go beyond what you can keep in your head, unless your personal capacity is naturally limited I guess, because as soon as you progress in some way the world has changed and you have to reevaluate everything anyway, so there was no reason to worry about the stuff you can't focus on to begin with.