I’m pretty sure the programmability of PostScript was a mistake. Adobe clearly thought that because most of it was removed from PDF. I was working in sales/sup

I’m pretty sure the programmability of PostScript was a mistake. Adobe clearly thought that because most of it was removed from PDF. I was working in sales/support/marketing for printer companies in the eighties and people were buying PostScript printers for the scalable fonts, device independence and compatibility. The most common objection was performance which was somewhat related to the programmability. We used to supply the red and blue books with each printer but I don’t remember anybody breaking the seal on them. Having said all that I have spent the last year writing a PostScript interpreter. I’m not sure I’d call PDF concatenative, you certainly can’t cat two PDF files together to make a merged document. There are header and footer sections to deal with.