Tbh it’s probably less of an Adobe problem and more due to the absolute mess that is PDF annotations.
Despite being a defined open standard, most free PDF viewers either don’t support them (zathura etc), or fuck them up (GNOME evince). Even some of the viewers that do support them like Okular need extra configuration.
Unironically Firefox as a PDF viewer actually has the best support for PDF annotations.
I once failed a uni assignment, because the teachers assistant wrote remarks on a pdf in a way that’s only viewable in adobe’s products.
She failed us because “we ignored her remarks”. Had no idea they were there.
Had the same in gymnasium, eventually got it overturned via bitching about it. Notes wouldnt even show up on their webapp : /
Tbh it’s probably less of an Adobe problem and more due to the absolute mess that is PDF annotations.
Despite being a defined open standard, most free PDF viewers either don’t support them (zathura etc), or fuck them up (GNOME evince). Even some of the viewers that do support them like Okular need extra configuration.
Unironically Firefox as a PDF viewer actually has the best support for PDF annotations.
The state of PDF Readers on Linux - Discussion - It’s FOSS Community - https://itsfoss.community/t/the-state-of-pdf-readers-on-linux/12798