Care to explain the joke? I don't get it

Yay^2

Is fusionpbx completely open source? Do you have any further reasons why you would recommend it?

I was looking into asterisk the last couple of days for a new company PBX and need some alternatives to compare against. Asterisk looks also a bit complicated though not impossible

Might be relevant here: https://www.podcast.de/episode/619883332/089-the-myth-of-left-and-right-a-conversation-with-prof-hyrum-lewis

English episode of german podcast