Some contracts may need to be upheld between creator and consumer. If the consumer doesn‘t want to, well, that‘s freedom, isn’t it?
Of course it is the most code executing document format to ever execute code, so if that was the issue...
Is postscript (that‘s what PDFs are ultimately right?) capable of thing‘s that HTML+CSS+SVG isn‘t?
Edit: Oh no I completely blanked on the fact that web pages literally don‘t have pages. Seems like a big one.
Web content is not that fixed, same code can redner different in different browsers this is why sometimes we need to use some css reset rules to attempt to make stuff render as similar as possible.
What is great with PDF it that it should look and print the same everywhere, I always have issues withfor example .doc files that don't look and print the same on my machine as the sender one and it is just a few lines of normal text, nothing fancy.
So a PDF replacer should be identical on all machines this means a extremely strict specifications with no place where implementation could deviate a pixel.
Nah, better leave PDF as it is, we don't need any accident.