I found that it is not worth planning too much in advance in a technology career as technologies and the types of roles change over time.

That doesn't mean that one should be directionless but don't spend too much time and effort on something that has no value for the foreseeable future and would only come to fruition in a decade or so. Unless you are doing it for enjoyment.

I am certainly not saying that one shouldn't invest in oneself but rather just don't play too long a game.