Google Chrome now loads PDF files natively and much faster than Adobe Reader. So wouldn't it be worthwhile to switch the default file association to for PDFs Chrome and uninstall Adobe Reader forever? Seriously, how many weekly updates are necessary to keep loading PDFs in the slowest possible manner? How much has Adobe Reader changed for you in the past decade, and how much has it improved in speed and efficiency?
Mokalus of Borg
PS - For me, the answer is "none".
PPS - To both questions.