And on sci-hub, it is really unfortunate that IEEE hasn't followed the ACM and removed their paywall for ancient articles. Esp since ostensibly, IEEE isn't a forprofit entity, these old articles have zero monetary value.

I'm a few years into seriously using APL and now work in it professionally doing greenfield development work.

Starting out, solving puzzles and stuff was fun, but trying to write real programs, I hit a huge wall. It took concerted effort, but learning to think with data-first design patterns and laser focusing on human needs broke through that barrier for me.

Writing APL that feels good and is maintainable ends up violating all kinds of cached wisdom amongst developers, so it's really hard to communicate just how brutally simple things can be and how freeing that is.