I think this is a good point. One other thing I would like to emphasize, after having worked only a little while professionally, is that its not as important wh

I think this is a good point. One other thing I would like to emphasize, after having worked only a little while professionally, is that its not as important what specific architecture you choose while learning, except that maybe you will write code faster and already know many of the nuances. There are so many resources available to learn any architecture now, that the best advice would be to pick a reasonable one and just learn it; with that experience, one can then move with confidence between architectures.