Well, to be fair, the 0/45/90 deg traces are a byproduct from early days of EDA CAD products. Aside high frequency busses (which you're doing EM analysis on anyways), traces can be all sorts of shapes. That 3v3 or 5v line can have 135deg traces - they might be ugly, but they're very doable. This is a case where early electronic CAD turned into a cargo-cult.
Prior to the early computing CAD days, the traces were really rounded and flowing, and had teardrop fills. They were also done freehand, with transparencies, markers, and tape.
Prior to the early computing CAD days, the traces were really rounded and flowing, and had teardrop fills. They were also done freehand, with transparencies, markers, and tape.
This is a good example of hand-designed boards: https://www.worthpoint.com/worthopedia/vtg-early-1970s-ampex...