I think, back in the day, a wedding was a portal to a whole new life, and who knew what lay ahead? Both bride and groom probably still lived at home (and may have even been virgins, or have had sex only with each other) so setting up home together was an adventure. Having time alone together was a luxury. Finding out who you really were, as individuals and as a couple, a new journey every day! Then onto the whole new, new life when you started a family...
Now, people tend to be older when they marry, they've already got their own homes and probably live together, they're secure in their jobs, they have dc. All of which makes the wedding still a lovely thing, but not the beginning of a new life that it used to be.
So if it's a bit less exciting, maybe that's it.