[Bubbadoo]

All points you make are very true. In addition, aluminum tends to crack as it ages and you'll find aluminum wiring is usually a culprit in electrical fires. In the world of mobile electronics, it's usually looked down upon as the cheapest alternative when compared to real copper conductor used in higher quality automotive wiring.

[Robotbeat]

It only requires proper engineering of the connection. Aluminum itself doesn’t crack in properly engineered joints. What fails in old houses is shoddy connections.

If people look down upon it, it’s because they’re either lazy or ambivalent. It’s the superior performance solution in some situations.