Exporting a Plot (if you are correct in it not working), should be a no-brainer in 2019...
it worked in older versions. it should still work unless:
(1) recently damaged by wolfram employees
(2) your pdf exporter is recently damaged by (adobe) employees
i have a problem never solved of grid box lines being way out of proportion when (printed to ps or pdf) that wolfram just can't solve. it used to work.
i investigated the .ps code and found each region in a PostScript is exactly specified (inch and dot) in units, but that the wolfram code has used units referring to front end usage (which the old wolfram exporter did not do)
One could comment "technology isn't going that direction", we need nVidia 3d and breaking 2d graphics isn't a concern, and people don't print they cloud to iphone. but i feel these are excuses for altering code without first understanding it.
Instructions to remove basic line information from saved plots just cannot pass without some scrutiny.
