Many of my fun memories of Factorio do involve biters though, both defending against them, and attacking them by building power lines and quickly building and t

Many of my fun memories of Factorio do involve biters though, both defending against them, and attacking them by building power lines and quickly building and then un-building laser towers near their bases (and later just by having super strong armor and a shotgun). But I guess a toned down offense on your base, while still allowing the same kind of attack, would work just as well. Also, the biters are somewhat boring at end of game, it's just the whole world map full of the exact same evolved bases everywhere.