I have about 4.000 ebooks on my device, and likely a similar number of paper volumes. (The ebooks are easier to count. The pbooks are on shelves, in boxes, and in an offsite storage facility.)
For me, ebooks are an additional format, and not necessarily a replacement for print. I have some books in
both formats.
I'm also one of those folks that buys hardcovers (with the latest the new Wheel of Time novel, acquired with an Amazon credit.) But I don't generally carry them around - that's what the ebooks are for - and I don't try to read them in bed, so the issues other folks here raise don't bite me.
I also don't get questions about my device, since I use a PDA, and people probably assume it's a smartphone and I'm playing a game.
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Dennis