Early in the NFL season, you hear a lot about the pace of certain stats. Things like, "Tua Tagovailoa is on pace for 5,400 passing yards." But most of the time when you see "is on pace" stats, we lack the appropriate context.
Over time, player and team performance usually regress towards the mean. Teams and players that started super hot will slow down. Teams and players that were terrible early will get better. So we don't want to compare a team's performance after five games to what other teams have done in full 16- and 17-game seasons.