For me, I saw it for the first time on the letsdecentralise web page a few years ago. I glanced quickly over it but didn't really understand it. I don't even think it had reached the 1.0 yet.
A bit over a year ago, looking at MayVaneDay's blog over I2P, I landed on her article "The web never died" where, among other things she praises reticulum.
I actually looked at it, read the manual, and started taking things slow.
It also allowed me to learn about LoRas, Ham Radio, and getting interested in general at radio stuff.
What about you?