[mooreds]

Either one that I wanted to learn or one that I knew.

Which of those depends on whether the focus of the passion was exploration of new tech to make an impact on my understanding of tech or exploitation of existing tech to make an impact on the world.

If it was the former, today I'd probably learn Rust + whatever webapp stack is popular in that language. Seems to make some pretty interesting guarantees around programming and is blazing fast.

If it was the latter, I'd pick rails. Nothing in my experience beats rails for productivity for a bog standard webapp.