Zorin in particular was the distro that made me stop using Linux a few years ago, the day I turned on my computer and all of the sudden everything was completely messed up. Took me a long time to recover the DE and get everything back to working condition. Immediately after I went back to Windows for the first time in years, which I don't love, but at least the OS is alway there when I turn the PC on.
How do people give their grandma a Linux pc and never hear from them again? Obviously a catastrophic failure like mine is not normal; and if you need 100% stability for a mission-critical system, I don't doubt you could accomplish it much better with Linux than Windows, but that's not by default. Do you disable automatic updates on grandma's PC?