thinking about the layout of columns in the previous draft, with this format you could actually just put the entire tech tree into one big tile-set that is divided into columns and expand them under those columns as needed on 1 screen (no tabs) and it would take up less space and maximize screen use, though it would require a bit of scrolling still
also you would have to remember the expansions done when you minimize an expanded tile
so you could put dividing lines or headers above different sections of the tile-set within those columns and it would be much more compact. also putting in a search bar or a quick link on a tool bar to go to designated sections might be a thing as well. I think mostly these would be more useful for those that want to heavily mod the game. otherwise I think it would be a nightmare to play the game.