That’s an excellent comment. The only thing I have to add is that is’s not some newfangled concept that’s bad but we’ll only figure out why in a couple of years

That’s an excellent comment. The only thing I have to add is that is’s not some newfangled concept that’s bad but we’ll only figure out why in a couple of years: APL has been around for over 60 years on various forms - it is about as old as Fortran and Lisp. In fact, APL was designed for paper, as a well-defined notation for algorithms in math and CS papers (which are still either sloppy with algorithm semantics or spend a lot of space specifying their non standard notation to this day). But since it was well defined, it was actually executable, and when computers were good enough, an interpreter was developed at IBM. That’s why APL has so many weird symbols (it’s a paper notation for math, at heart). K is a practical simplified version/dialect that uses only ascii (as does J, which is essentially full APL with ascii) One of the main complaints against APL is that they are write only. They take longer and more effort to read per character, granted, but per “semantic information”, for any reasonable definition, APl/J/K are way faster to read for someone proficient (and yes, I take proficiency for granted - the minute details in any language between Boolean short circuit, non local control transfer, integer/float conversions etc make proficiency essential)