All the conferences I’ve been to had dongles readily available. Most used hdmi. Once I had hastily arranged breakout room that had VGA for the Beamer. I think this is a non-issue?
I always carry it with me but usually they have some sort of screen casting tech around already.
I do make it clear from the planning stages that they need to provide either one of 3 video inputs to their selected system (HDMI/DP/Screen casting) or they need to provide the computer that I can use to remote into my 13"(this is what they usually choose if they have older screens or projectors).
Then you'll take a dongle with you to that conference? Are you telling me you would always waste one of the 4? framework ports for Display Ouput X that you only use once a year?
