Paper / Electronic QSL cards

I've been into HF operations for only about six weeks now, but I have faithfully mailed out paper QSL cards to every contact I have made (other than the W1AW stations I've worked), It makes over 40 QSL cards I have sent off. My response? Only five have returned the favor. From looking at ham operator profiles on QRZ it seems that many hams only respond by electronic QSL card, others demand an SASE (sad, I think, that a ham who can afford to spend $15,000 on equipment is unable to afford a roll of stamps), and others say outright that they don't QSL at all.



Is QSLing a thing of the past? I wish now that I hadn't bought so many cards from the printer....