Do you think Living Together Increases The Chance Of Having A Better Marriage

I observe that today couples have a tendency to take their time on issues of dating and marriage, many people live together and to tell the truth do every little thing as a married couple can do – just to try their compatibility and etc, I believe this technique helps a whole lot, as it allows people to comprehend themselves alot better and at an amount they’d haven’t known before – However, does this guarantee a happier marriage? I understand people will change and adjust during the time scale of studying one another, but ultimately after marriage dont people just get back to being their former (real) selves and just forget about most of the sacrifices made before?
I will like to know your views on this subject