It is kind of hard to explain but the first time I learned about digital/analog conversion and wired up a very simple speaker and made it play any note I wanted by simply tweaking the processor’s clock, the magic left me. Before then I couldn’t even fathom how that worked, then it was like “that’s it?”

Just an overwhelming sense of disappointment in how much sense it made that it worked that way and not a myriad of more spectacular ways I’d imagined when I was a kid taking apart ancient IBM color monitors for fun

Biochemistry is pretty magical, have you tried digging into that? Immunology or protein folding might be just the thing for you.

You can get exactly the same kind of feeling with RF too, I worked around that space for a decade or so and the structures and effects that felt magical I look at and just see capacitance, inductance, coupling, loss etc. - still interesting, but it hasn't felt like magic for years anymore.