My choice is chaos. I started decades ago on notebooks, quarto pages and foolscap. Certificates from overeas were wrong shape and size for standard sheet protectors here so they got folded or put into envelopes.
I am not into acid free etc simply because I know the paper stack will go in the bin when I am gone. My kids will be happier to have it in digital form for their homes do not have room for my stuff.
I have their childhood memoroabilia stash here and decided to digitize everything and pleased I did for 2008 gave me reality check when 1: 200yr flood hit here. I discovered those vacuum seal bags are NOT flood proof for all of those that were on the floor sucked in the water happily.
So my advise to you is to consider why you are keeping everything, how long you intend to keep it and if anyone is going to be willing to have it when you die.
Digital records deteriorate too, storage units are affected by weather and age and outmoded by latest and greatest new storage method.
Back up your digital records and send them to family near and far as just that- back up security.
original document you do same as everything else at the end of the day. Keep them in storage affordable to you. Acid free, lineen free etc is expensive and not necessarily going to last any longer. Environmental factors and circumstances will always determine what lasts and what perishes.
Have fun on your journey and just do what feels right to you for you.