In a documentary about KDE, it's interesting how many (most) of the people shown using a computer are running macOS...
I was also surprised to see that they use Macbooks. I also have one but I find it a weird decision to showcase in a documentary about KDE.
Kudos to the guy with the Dell(?) laptop in the video. :)
Maybe some of those original developers have just moved on to new jobs and projects?
That was my comment. It seems that they use MacOS as their primary system and have KDE running in VMs as "projects".
When I switched to Linux in 2008 (Ubuntu), I felt a big relief from not using Windows anymore, andnever turned back.