I can understand someone using Adobe Reader over Okular.
My reason is that last time I checked, Okular will not allow you to change the text size on a PDF document and then rewrap the text so that the formatting stays the same only the text can be large enough for some of us who need it.
Okular and the other programs I have tried simply will not do this but Adobe reader will.... If you don't mind figuring out how to set it up to do it again after every %$##% update.
If you have a fairly new fast machine, have you considered running one of the minimal version of 32 bit PCLOS in Virtualbox with it set up to share the folder that you save your PDF documents in?
That way, if you have not yet tried Virtualbox, it will give you some valuable experience using it.
I always download PDF documents and then View them in Adobe reader rather than using a PDF plugin in the browser.
In fact, I hate that all the browser folks seem to want to force you to use their preferred plugin rather than defaulting to an external reader the way it used to be done.