I thought I was to infer from the parent commenter that the fun is learning to write Postscript documents to send to a program and use vulnerabilities in Ghosts

I thought I was to infer from the parent commenter that the fun is learning to write Postscript documents to send to a program and use vulnerabilities in Ghostscript, and that would be useful in compromising a printer itself. For example, if I want to DoS a printer, I send it a corrupt job, with intentionally nasty PS directives. I have seen people do that. But what if we take it a step further? I want print jobs stored on the printer, with potentially sensitive info. Do HP printers at the software level use Ghostscript on some models, and I can use known parsing problems to get gs to dump memory, or file system info, that I can later find through Embedded JetDirect admin web server or other means? Can I use it gain root and then make reverse shells? I know some modern printers run embedded Linux, but that's all I know. Again, I am interested to know if ghostscript is just a known Postscript platform generally or it is also used in printer themselves, is a useful exploit vector, and I am ignorant. Either way, I am ignorant. I am new to this domain and wish to learn more. Sorry for the dumb questions. (Also have the Blue Book in my list of lazy/bored reading materials.)