Everyone's situation is different. I moved out at my XW's insistence, for a 3-month "trial separation." (But a 12-month lease??) I was trying to DB, being reasonable. At the same time we took a "break" from MC. During this time we (mostly) only communicated about the kids.
She was insistent that we not tell the kids that it was temporary, because that would give them "false hope." We just said we weren't getting a divorce "at this time."
At the end of 3 months, XW saw "no point" in going back to MC, that we had already done it to death. So why did she act like we'd start back after 3 months?? At that point it became clear to me, what I feared from the start, that this "trial separation" was just a way for her to ease me out of the house.
All the precedents had been set. Occupancy. Custody. Visitation. Support. For 3 months. Game, set, match.