alt Hacker News> I haven't had needed or wanted a dedicated PDF reader in all that time.
OK. Now load 100 PDF's. You will need a dedicated PDF reader unless you don't mind wasting a truckload of RAM. Also, browser PDF readers are generally slower and are not optimal at search/bookmarks/navigation/etc.
I've never needed to load 100 PDFs at once, and honestly I don't imagine I ever will. I guess it might happen for some people, so a dedicated app would be useful for them.
For me, having a separate dedicated app isn't worth it for the benefits you mention, which to me are minor compared to having to install and manage another thing (which, to be fair, I imagine Sumatra to be a very pleasant citizen at compared to Acrobat).