Give me some names that works out of the box and resembles Windows. I have not tried Linux mint so I don't know how well it works for older people. Ubuntu has been quite good and stable but it has also required fiddling with the terminal.
The only one I found to be the best alternative to Windows is ... believe it or not, DeepinOS.
Even Windows can be quite different from older versions of Windows.
However, I don't think some of the older people are willing to go through all that. I wish to see an easier option for people who wants a smoother transition from Win10 to something else, especially now since Win10 is being discontinued october this year.
People like to freak about how arch isn't for newbies but honestly it's fine. I find it to be just as stable as Debian.
But let's be real, aside from gaming, 99% of what the average user does with a computer is open a web browser. Dekstop apps are secondary. If you put a Firefox/chrome button in the task bar, you've covered most user requirements.
Power users who actually need a bunch of proper desktop applications have a different set of needs. It's impossible to generalize, but a very large fraction of those users would probably be happy with the Linux alternatives, or wine and proton. A lobotomized W10 LTSC VM is also quite usable.
most users won't know or care they're on Linux if the browser works.