AdivingBel
Diver
I think the biggest problem you had was looking at a specific cross-section of divers. Vacation-only divers don't log dives. They don't care to. It's not their "hobby." It's fine that they care less than the more dedicated ones.
Funny, I'm just the other way. I do most of my diving while on vacation. I log my dives not only for the diving , but so also as a bit of a travel journal. If I dived locally or alot more often, I could see myself not logging dives. I log digitally including downloads from my computer and periodically print out updates to my paper logbook as a hardcopy backup. My wife is an artist and she made me a very nice logbook cover, so it would be a waste not to use it. I really like digital logs because I can link media to specific dives. Everybody is a little different.