To further this one bit - the batteries on my spiral notebook have NEVER died and extra pens are easy to carry and or find (read steal - if no other option presents itself) when needed.
ANECDOTE: I've got notebooks from 15+ years ago in a filing cabinet. Will they ever be useful to me? Likely not - but at least my kids will understand why I'm crazy if they bother to look through them. That said, having the last year or so's notes readily at hand can be a huge win - especially if you work on longer running projects or programs. Or, heaven help you, you have to maintain legacy products where each relevant detail is painfully pried from an unyielding source.