been running "unstable" since 2007 as my daily driver, work-horse, dev-machine, ... Not once faced a "problem" I couldn't recover from. Not once a restore from backup of the main OS due to something the upgrade or OS had caused, no booting from a rescue-image. For something that comes without warranty and has "unstable" in it's name, it's pretty solid.
Apples and oranges of course, but it holds up also well compared to Windows (which tbf, has gotten more stable since Win98), or even compared to MacOS that also crashes at times even after version MacOS 9.x (which was when MacOS became usable in the sense of "stability").