That's not 100% true. The pathfinding is atrociously bad in SC1, which is usually attributed to how they took the WC engine and made it isometric, but I assume was partly also due to performance. Whenever I go back to play it, that's the one thing that frustrates me every time when playing the campaign.
This sort of "atrociousness" is also why it made the competitive scene work, because it allows skills to show through. If you select-all, attack, the pathing will cause you to lose the fight against someone micro-ing the units.
I don't disagree, but when I'm playing the campaign or custom maps, I'm not too worried about skill expression and micromanaging these brain-dead units is not all that fun.
