Another important consideration is ease of routing signals during design. Using 45 degree corners in general produces pretty space-efficient routing that makes

Another important consideration is ease of routing signals during design. Using 45 degree corners in general produces pretty space-efficient routing that makes it easy to cluster signals together as well as move them if necessary during layout. One point the article left out is the risk of traces lifting off of the board. Having less sharp corners seems to reduce the risk of this happening with components that have a mechanical risk of coming off (like USB connectors, or large capacitors).