Nice article. I had to go down this rabbit-hole researching my first book. Actual likelihood of anyone actually being able to receive these past a few tens of LY is quite low without very sensitive receivers. Also as another commenter pointed out the window for receiving us is closing as more modern wide-band and spread-spectrum signals are more power efficient, directed, and look much closer to noise than data.

A lot of people think the “great silence” from SETI means something, unfortunately.

A civilization using only low power radio wouldn’t be detectable in the Centauri system.