Tangible Results 

There is something a card will always have over any digital alternatives: Humans have evolved to react to physical stimuli. By having an actual object like a wedding invitation card printing to handle, your mind will mentally distinguish it more vividly than dozens of e-mails or chat messages could. 

This subtle difference can make someone using a name card more memorable, which works as a subtle way of advertising, especially if a potential client has several to choose from several options. After all, will you remember the standard, generic Arial text on your inbox, or the fancy lettering and design on a custom made introductory card? 

Of course, the use worldwide of these cards is also bolstered by other factors: less wealthy regions may not have access to widespread modern technologies, so a reliance on older methods is a must. In other cases, such as Japan, a strong cultural aspect in business makes cards an art form in itself. 

And finally, there are some that seek to collect them, just like coins or postage stamps. They often look for the rarest or oldest cards they can find, and even form communities to exchange cards with each other. 

In the end, even as more modern alternatives emerge, it is highly unlikely they will ever truly replace name cards; new materials will emerge, new techniques and uses will be implemented, but the basic card is as universal as having doors in your house.