Here’s a question for you: when your PCB has a ground plane layer, where do return signals flow? It seems like a trick question, but as [Kristof Mulier] explains, there’s more to return path routing than just doing a copper pour and calling it a day.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/03/18/proper-routing-makes-for-many-happy-return-paths/