Properly viewable and properly printable files NEEDED!
When creating a final file from Illustrator for a printer, I change type into outlines so that there will be no font problems. Then I save as a PDF. The PDF is VERY inconsistent in how it shows straight lines of letters. ie: lower case "L", cap "I", hyphens, dashes, and other letters with "straight" lines -- p, d, M, etc. The pdfs look terrible unless you blow them up very large. AND when you print them out, you can also see the differences in thickness of the letters on different printers. Questions: How do I tell my customer "Oh, ignore that" when they see a terrible looking proof? How will I KNOW if a file sent to a printer will print properly or not if I can't see or print a "good" file here? If a customer sends my file to their printer and prints 1000 letterheads and the letters are inconsistent, are you going to pay for that? These are supposed to be programs usable for graphics and printing. It happens with InDesign also. I pay a monthly fee and I can't get the programs to work properly. What's up with this?
Thomas Phinney commented
Fonts have extra data called “hinting” that helps the rendering system maintain a consistency in things like letter thickness even when few pixels are involved. Adobe solved this problem when they invented hinting for PostScript Type 1 fonts back in the early 1980s.
When you convert text to outlines, you are destroying that hinting data, and telling the world that you don’t mind one-pixel differences between different instances of same-thickness strokes.
There is no app yet developed that has a workaround for this problem. The correct answer is: don’t convert your text to outlines. This is a “font problem” ... that you are creating.