Not to beat the dead wedding carriage horse, but while overall weddings in general have gone more formal, the differences are not so much time related as region related.
My family is from the NYC area. When my parents got married nearly 50 years ago, they were fairly poor. However, it never occurred to them that they would have a wedding without serving some sort of sit-down meal with wine. There may have only been 20 people at their wedding, but it was still meal and wine.
When I got married 26 years ago, again there was no question that you would have a sit down meal, drink of all kinds, and a band. My wedding had full appetizers, a sit down full plated meal, a traditional cake, an open bar, wine on the tables, champagne toast, and TWO drink fountains -- this was considered the norm. We spent a grand total of $1500 (for everything). We avoided any problems with drunks by not inviting the drunks. (Hey, we're New Yorkers, we have no problem telling it like it is. What can I say?) The overall idea was that if you weren't going to serve a 'real' meal, then you were eloping and no one was there but your parents and best friends who stood up for you. There was no inbetween. I can also tell you that my parents -- who footed most of the bill -- would have never given me the money for a house downpayment or to pay off my student loans. That money was for my wedding, period.
The thought of a cash bar was absolutely unthinkable. I had never even heard of a cash bar at a wedding until my SIL got married in MA and had the most expensive wedding any of us had ever attended, but had a cash bar (complete with $10 Diet Cokes in 1984). Her cash bar was considered the height of tackiness and 20+ years later, people still talk about it. Her father offered her the money t use instead for a house down payment and he was considered beyond the pale for even making that suggestion.
I had never even heard of a church basement reception with punch and mints until I moved to the midwest 20 years ago.