It's funny seeing different peoples' takes on this; someone else said the frontend section was a 'hot mess' but the backend was much more structured and well done. Guess it's just a testament to how much is out there.
Learning a framework will enable more participation and contribution _now_. And arguably knowing the framework isn't so important compared to going through the _process_ of learning one; if you know how to do that then you can just latch onto the next up-and-coming framework. But yes, it's certainly also good to master JS itself.
My friend, whether you're trading naked or spreads doesn't matter on timescales of corporate rot are ~30 years; the contracts available to retail traders are like ~2 years out.
Yeah there was a post about that on HN that got a lot of attention a week or two ago. I think that letter/essay was written before google cloud platform was really a thing, would be interesting to know how things have changed since ~2006.