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> OP wants to "develop a personal philosophy." So they will want to learn the state of the art of philosophy. Starting with Plato to learn philosophy is like starting with Archimedes to learn physics. I'd suggest the opposite, do start from the Socratic dialogues if you are really interested in philosophy. On the other hand, if you want to be a tech guy with the common tech preconceptions about philosophy, feel free…
I agree that there is no such thing as a "state of the art" in a subject such as philosophy... but you can read a lot of stuff from e.g. Plato or Aristotle that is just refuted nowadays. For example, I studied linguistics and whenever I had to read Plato about language I was reminded that he really had no idea what he was talking about. I also personally don't like Plato (he always creates these absolute strawmen as…
So, it's ultimately a question of why do you even want to study philosophy in first place. I suspect that for most usual purposes, Plato is perfectly okay.