I learned on tables and dive watches and it's a habit that I still embrace. Watches (of which I have accumulated quite a few over the years) have always been part of my bare-bones dive kit that I carry (which lives behind my truck's bench seat), and which only requires a quick trip to a local dive shop for a rental tank, if conditions are just too good to possibly last, and I have no time to get home.
It is also a dependable backup, for when electronics go tits-up, which they have done a few times over the years. I shrugged, maybe swore a bit, and looked at the elapsed time on my watch's bezel, and continued.
I also carry an analogue SPG / pressure gauge, along with NAUI tables in my dive bag; and I find the whole thing rather liberating, that bare minimum of kit, which had always been the biggest appeal when I first began scuba, as a kid -- and it's reassuring that you can still dive without being lit up like a Christmas tree and dressed for that marine assault on Pebble Beach . . .