I have no need for printed manuals. After a couple game updates they are obsolete (I don't understand why Matrix offered 'upgrades' - pay 14 € and get a printed but outdated manual for WITPae and other games).
A pdf manual gives you the advantage that you can search in it (CTRL F) to find what you are looking for, and if you really want you can still print it.
Maybe after a few updates someone makes a new manual (I know : wishfull thinking).
I own and like Stellaris but I think they took it a step too far : no manual, no quick start but only an incomplete wiki.
I watched let's plays before release so I didn't have any problems starting to play the game but after a while little annoyances start popping up.
E.g. : you can't build X on this tile because you need Y. OK but what is Y, is it an edict, a research tech, a policy, ...
Let's see if they do the same thing with Hearts of iron IV or it they release the manual as part of a paid DLC