It is kind of shooting at the ambulance, zoom needs to also adapt to the new API. The alternative is a completely non functional Wayland for videoconferencing for years… Unusable stable is not better than unstable usable IMHO at least you have a shot at fixing it for the second option.

It drives me crazy. Just release it 18+months ago and iterate with versions, at least your users will have the feature in their hands.

Is it something you cannot learn by yourself or the certification is valuable for your career?

The presenter banging on the keyboard, seemed totally distracted for minutes to say 2 sentences. It doesn’t need to be perfect but that level requires way too much good will to not just close the video… There is nothing wrong to say, ok let me regroup for a couple minutes then fully jump in for your audience.

Your overall process is perfect: first try to solve it from the UI, then the console, then the magic sysreq key.

The fact that your kernel was not responding to the sysreq key could mean a couple things: is it enabled on your install? (cat /proc/sys/kernel/sysrq to check)

Before trying to understand why the kernel locked up, are you sure everything is solid on the hardware side? ie. Did you overclock anything? If yes did you burn test the PC on some GPU demo?