Depending on the destination, checking in at least one other suitcase as well as a carry-on is still the norm among most travellers due to the stress that comes with bringing just hand luggage for a trip.
There's frequently some stress involved in boarding the plane early to make sure you get the space you need in the overhead bin above your plane seat. However, you do enjoy savings with just a carry-on because you don’t need to pay a baggage fee. Plus, you can also leave the airport terminal earlier when you don't have to wait for baggage claim.
Whether you support the "carry-on culture" or not, there are some items you definitely have to pack in your hand luggage to make your time on the plane not just bearable, but even enjoyable and relaxing.