here in the main hall, they have on royalty-free techno music. the music is being played on a mac (non-free software), in the brave browser (free-ish software). in the dock there are several icons for microsoft and other non-free software.
they have swapped out for another machine running KDE (free software). it is showing a slideshow authored in Google Slides (non-free software), and the browser appeared to be Firefox (free software).
@ariadne This is one of those moments where I think "I should have..." I work my ass off to fight off proprietary software and big tech, actually succeeding, and I didn't go.