From my experience having used Linux for years: Here is the full list of problems I encountered that I’d say are not the result of me tinkering:

• Nvidia driver is fucked up
• A hard drive also used by Windows won’t mount
• The software app can’t update my system
• 2nd monitor won’t work correctly (pretty much solved nowadays)

Those are fairly common issues afaik, and they are caused by using a slightly more complex setup (dual-booting Windows, extra repos in the package manager) and notoriously troublesome Nvidia hardware. For all but the last there is a one-line command you can run to fix it, and it took maybe 2 min to find it on my phone.

Apart from these issues it’s been rock solid, so I’d say you’re good as long as you avoid those known causes for problems (No Nvidia, no Windows, no extra repos), or you are able to find solutions to the most common problems and run simple commands on the terminal.