Review Suggested Edit

Why are antenna PCB traces square instead of rounded?

While doing some reading on RF designs I ran across this paragraph:
![Image alt text](https://electrical.codidact.com/uploads/RujqCUPuetJrJjyVS2FwGDxg)

I have never designed an RF circuit, but all the PCB trace antennas I have seen on development boards are square. For example, ESP32:
![Image alt text](https://electrical.codidact.com/uploads/L4JTVnV799Ar84TcUjXFaiFa)

More examples can be found online. If the important thing is the length of the antenna for the corresponding frequency, wouldn't it be better to have round corners for the trace antenna for the reasons mentioned in the paragraph above?

Edit: Lundin has expressed doubts regarding the design of the ESP32. So I feel compelled adding more examples to emphasize that this is not a one-off design. And it would be interesting if a bunch of people decided it to do one particular way without a good reason. So another antenna:
![Image alt text](https://electrical.codidact.com/uploads/y8cwJ2FErpPi6UmfnYTqvf2W)

And yet another one:
![Image alt text](https://electrical.codidact.com/uploads/q34LHkSx5sFLzZSSNagX4Uxb)

To be fair, after more searching I did find one that has round edges:
![Image alt text](https://electrical.codidact.com/uploads/13MdeuCuQEmbhCy4XEAQKe3F)

This does not seem to be the standard approach from what I can find.