That makes complete sense to me! I often borrow as well, either through my library or through KU (although I have been considering dropping the KU subscription in favor of Kobo Plus). I get lost in my digital collections far too easily and I only have so much shelf space, so buying books for me is more rare than borrowing. I very rarely re-read anything, so there's not much use for me to keep a book around after I've read it.