Started on a manual 510 way back in 2009 after watching a news vid on ecigs. Had no intentions of quitting analogs, but I live in Vermont, don't smoke in the house and wanted to be able to smoke something that didn't require me freezing in the garage on winter nights when it was -30. Used the 510 off and on, mostly during the winter.
Then, earlier this year, I upgraded from the 510, again, with no intentions of quitting analogs. Was so impressed at how far the technology has come since 2009 and how much better the vaping experience is, that I did quit analogs and haven't looked back since.