I tend to find the opposite. I find more and more hotels demanding cash deposits instead of credit cards for incidentals (even though the room is being paid with credit card). Some demand deposits as high as $1000 per night in cash, even on rooms priced at a fraction of that cost.
Of course, most of my travel is in West Africa where the volume of credit card chargebacks can touch 90% at times, so undoubtedly that may play a part in their thinking.