In order to run a business in a manner that is consistent with modern practices, you need to be willing to abandon the old in favor of the new at any given point in time. A big part of the reason why that is the case has to do with the fact that several old practices tend to be rooted in concepts that are not all that compatible with how business is done in this modern day and age, but that doesn’t mean that all aspects of old school business have ended up becoming obsolete in some way, shape or form.
For example, if you were to look at metal cards, you would see that they still play a role in helping businesses to establish themselves. While there are also a wide range of digital techniques that can provide you with the same advantages as business cards and the like, you should also bear in mind that handing someone a business card is still a powerful way to get your message across due to the reason that all of the pertinent information regarding your enterprise would be displayed on the card in a relatively easy to read manner.
Hence, to answer the question of whether or not business cards are still important, you need to understand that they still provide some value. You can ignore them if you want to, but suffice it to say that this will set your business back a fair bit since you would have no way of handing people an easy to digest card that will leave them better informed about the various products and services that you offer as well as your overall brand image.