How many plants fit?

Happy new years everyone and thanks in advance! I have a 4x2 tent and I wanted to know how many plants should I/can I have in there comfortably with out worrying about cramped flowering space many people saying 2-4 others saying 3-6

Happy new years everyone and thanks in advance! I have a 4x2 tent and I wanted to know how many plants should I/can I have in there comfortably with out worrying about cramped flowering space many people saying 2-4 others saying 3-6