It’s a choice. I’ve seen some Youtubers do it but the extra clicking associated with keeping the cube in the inventory is too tedious for me. I just keep about 11 squares open.
This is good but at some point before every 2 days you should have to return your finds to the stash.
I think charms are a much more interesting system than salvage. It’s not outdated, D2 does it and it’s still one of the most popular arpgs in the world in part because of charms.