It isn't a happy sign of our times, at all; but wedding thank you notes have somewhat become a bit of a forgotten tradition of late as have thank you notes of every description. People do still send thank you notes but they're usually preprinted ones, bought ready-made. Most of the time, they're just sent out en masse through e-mail. People just don't write beautiful, thoughtful handwritten wedding thank you notes anymore. They would rather pay a commercial service to send out handwritten thank you notes these days than do it themselves. We live in commercial times.
Women who hope so much for the beauty and the warmth of a traditional wedding, often forget how our traditions aren't just about putting on a grand show. They are also about actual warmth of a kind that money cannot buy. Welcoming your friends and relatives with heartfelt appreciation and sincerity, and letting them know of it by writing their wedding thank you notes by hand gestures of this kind are what make for real tradition. But it has to be heartfelt not a show of "look at how good and traditional I am".
Often, when people do take the time out for handwritten wedding thank you notes, they go and make a meal of it. The way it's done, the people who receive it are reminded more of how this person is so superior and perfect in not giving in to the coldness of modernness than they are of how the writer of the note really appreciates how they came to the wedding. A good way to make sure this doesn't happen, would be to write an informal thank you note on stationery that's completely unpretentious.
In fact, putting it on plain paper, and putting it in a completely plain envelope might be far better than anything that looks showy.
But it certainly would be a good idea to think of a special theme or idea for your plain paper thank you note. For instance, you do need to thank each guest for their gift. You do need to show them that you notice, remember and appreciate it.
What if you were to say something about how when you were a child and you asked about something or the other that you saw around the house, your mother would tell you that it was a wedding gift from such and such; and now, when you have children yourself, and when the child asks you about this thing that's a gift, you can tell your child that it was a thoughtful gift from this person. That's a great story that's likely to bring you a lot of love.