I generally like to go to Distrowatch on Mondays and see what the weekly newsletter brings. I do this with various others, but this poll today just had me laugh:
That may possibly be down to the fact that not a lot of people bother with Distrowatch polls or even Distrowatch itself. My biggest disasters have been accidentally wiping Zorin 15 after a family argument, more recently wiping my PCLinuxOS Debian Plasma when I thought I was overwriting kde neonuser! The biggest fiascos happened over a year ago when neonuser updated from Plasma 5.27 to 6.0 and no-one could log in! The next disaster was a major update from one version of Ubuntu base to a next one and totally borked the system. Then most recently updates to neonuser Plasma turned it in to a fully-fledged Ubuntu 24.04 with Gnome DE! 
No distro has broke to the point of not booting to me, but the closest to that was a problematic kernel update on debian last week.
The pc works fine, then i turn it off and unplug it from the wall like usual, then I hear a metalic "click" sound after a minute or two and next time I plug in the pc's power cord, it doesnt react in any way to the power button until I switch to "off" and then to "on" on the power supply or unplug the part of the cable that goes into the power supply instead of the wall for a few seconds.
I know the problem is not the hardware because booting with the 6.1.0-28 kernel instead of 6.1.0-32 solved the issue.
That to me is the point of not booting. If the user needs to go in with manual intervention, and change something to get the system to boot (however minor that issue is) is a "broken to the point of not booting". Because your system, as you say, would literally not boot without changing the kernel. And I despise the fact that seemingly minor kernel upgrades within the same major series (such as the case with yours) has seemed to have a good amount of problems as of late (not just Zorin kernels, but kernels as a whole).
I think people are trying to score a few internet points with this poll 
For me, it's within the last five years, the last one was either Linux Mint or Endeavour OS. Both failed on me but I can't remember which one was the last one, although this was with the Ubuntu-based, or "regular", version of Mint. With LMDE, zero issues so far.
The problem with polls, you have to rely on the answers being truthful.
The last time Linux didn't boot for me, was back in 2020, and I was the one who caused it.
While it is indeed a well known truth, that Nvidia driver updates can cause a no boot black screen, being diligent in researching the driver before updating, can prevent it!
Perfect example, don't install Nvidia's 570 driver on either Linux, or Windows! Even now as we speak, Nvidia are trying to issue patch updates to Windows users, and the driver is still not right!
