Blueprints and construction bots, plus the well-thought-out and extensively battle-tested set of keyboard commands for them, are basically a brain-game interface for Factorio on the level that Vim is for text. For the grandparent’s “rip and replace coal burners” I am hitting mod-D and dragging a selection box over the offending area, then hover-Q on a nearby element I want to use and shift-click to plan it, once I have planned one instance of a subpattern its mod-C select, click hold and walk in a direction to tile it in one dimension, mod-C select, click hold walk to extend this over the other direction. It is now done, the bots will handle everything else - because Wube are an incredible bunch of UX engineers, I can place the new building before the old buildings are even removed, leave, and trust that everything will be done correctly. Highly recommend getting a “Starter Bots” mod that feels appropriately balanced.