To a degree, but you forget that people change, alot of times for the worst and you don't end up with what you signed up for. The ones that stay through the bad change are left enduring and toughing it out for the sake of their security or being "safe" with the person or because of the kids and they sit there stuck, miserable like and trash their mate ever chance they get e.g. Married men apart of the GMB tribe
Or it can be their other way. They connect on every level but they get bored want to grow out of what they already have, and they wander or start longing for that space again
In both cases, change can happen and it can make the most "perfect" marriage a miserable one.
OF COURSE. YOU SHOULD EXPECT CHANGES. AND BAD CHANGES CAN HAPPEN. THAT'S WHY I SAY YOUR VISIONS SHOULD LINE UP. PEOPLE CHANGE ALL THE TIME BUT THEIR VISIONS ALMOST NEVER CHANGE.
THERE IS NO WAY TO PREDICT IT. ALL YOU CAN DO IS MAKE SURE YOU DO WHAT YOU CAN TO GET THE BEST RESULTS.