[3pt14159]

Both my parents used to code (my dad on punchcards and my mom on a massive mainframe). It took significant time for either of them to pick up HTML for side projects.

Even in my own life, I was a developer from 10 to 18 (working 14 to 18, school 10-14) then I took about 7 years off to go do physical sciences. While I retained the basics like for loops and function calls, I totally lost a good portion of the rest of it.

[badclient]

At least in your case, you not only stopped coding but you stopped being around code or dealing with code. That is very different from not coding for 30%. Good chances that if you coded say 5-10% a week and spent the remaining time thinking about code architecture or code reviews, you'd be in a much different position.