Depends on your case. If doing the same amount of travel next year I would say yes.

If you think you will be traveling for many years than lifetime gold/plat is worth achieving.

It's not a simply yes or no question as other factors like location and type of properties you stay at plays into decision as well.

I've personally had good luck with Marriott having properties where I want to vacation and can find rooms to book into, plus have been generously upgraded as a plat whereas as a gold I never got them. So having a lot of points and accuring at higher rate on one account had made platinum more than worth it.

If you think you will travel less next year than maybe just use the rollover nights help you get status next year.

Decisions, decisions