Right. I went X30 -> X40 -> X61s -> Tablet 2 -> Helix 2, the Tablet 2 as an experiment (I love the keyboard that came with it and keep that paired with my Nexus

Right. I went X30 -> X40 -> X61s -> Tablet 2 -> Helix 2, the Tablet 2 as an experiment (I love the keyboard that came with it and keep that paired with my Nexus 7 now for emergency ssh-ing) and then I jumped to the Helix 2 rather than another X series because there didn't seem any point. Somewhere around 2019-2020 when I finish destroying the Helix 2 I'll probably end up back on an X series.