Benefits of Vault Viewer?

[Shadowfoot]

I'm struggling to understand why I would use the vault. I have the PDFs, which I usually read on my iPad when not in a game. During a game, I open the PDF on my laptop or search Archives of Nethys. My players who benefit from my Patreon Account also search Archives of Nethys. Within Hero Lab Online I have all the game books and the character options for the current adventure paths.

Switching tabs or applications is quicker because when the information has been found, there is no delay in switching back to the Campaign Stage.

What is the use case for me?

• Is it to let my players experience a set of rules with more context and related matter than Archives of Nethys offers?
• Does it bring back the additional details that used to be available when looking at skills such as Athletics?
• Will it allow me to annotate the documents with interpretations of rules, or annotate APs to customise them (and keep notes in a single place)

I like Hero Lab Online and want to support Wolf Lair in its continued development, hoping that GM material for APs will soon be available (Age of Ashes and Kingmaker as my priority) but should I support the Vault if it has no benefit for me? I'm concerned that such support will focus more effort there and may cause the GM material to be deprioritised further. (Even just getting the unique NPCs would be very helpful.) I realise the GM material will have a smaller target audience than the player material for APs.

So as I say, what is the use case for me?