Programmer will be the last job, but most programming jobs will be a part of the first wave to go. I can't tell you how many days I've felt like my job (wire up this API by googling then massaging a code sample) was such an obviously mechanical process than the AI needed to do it was not significantly more advanced than where we are now. I do not expect most of these jobs to last another two decades (at least by then ageism will have pushed me out anyways).