Training Livestream - Saving and Loading - June 6 - Live from Epic HQ

I get using data tables for storing static data, but what’s this about saving? There’s nothing on that page about saving and all my googlefu has resulted in that data tables can not be used to save to from a built game.

Saving data in the way shown on stream - getting each variable like the characters health and mana and energy etcetcetc and passing them to the save file object is, I don’t know what to call it, a slow method that is repeated for each variable that needs to be saved.
But in order to pick up from where you left off, a huge amount of information needs to be saved. In an RTS it would be that each unit saves their order queue, mining progress, building progress and whatnot.
In an fps each nearby character needs to save their current animation stance and probably so much more.
If it’s some character talking and you save in the middle, they will pick up in the middle of the sentence.
So if all of this data needs to be saved in the way shown on stream, it seems like a massive amount of labor to create variables for each data.
So my question is, the games that do manage to save these huge amount of information, is that done though this slow, meticulous method?