> 'Tricks' like 'not including too many comments' were already well-known from day one of the ZX line (which started around 1980) because, well, you had 1K, 16K or 48K or RAM to work with, so every character counted!

But that GO TO/GO SUB target position in the code list matters, because does a linear search (so the no use comments, isn't only about wasting RAM), was new for me. And I toyed with a ZX Spectrum as child.