Linux

Most operating systems these days are just micro-kernels to run the actual operating system, your browser. Most users will be perfectly happy using whatever in most cases as long as you can get one of the major browsers on it.

If they have special requirements, then you need to figure them out first.

It depends! You'll get a lot of recommendations. And they're probably good recommendations. But there are most certainly Distros out there that are very simple. I would suggest you don't be afraid to Distro Hop until you find one that you really feel at home on.

If you're looking for something that's simple, out of the box, and out of your way, I'd avoid anything Arch based. Ubuntu or Debian based Distros will have the most documentation and therefore minimize the amount of time you spend looking for answers, however, Fedora based Distros, in my experience, are rock solid and sit comfortably between stable and the bleeding edge.

If you mean "dumb friendly" by "An exact Windows clone"... there are plenty of "Windowslike" Linux distros out there.

If you mean "user friendly" by "Easy to understand by any user"... then yes, (any) Linux distro is user friendly as is.

I actually tried linux (Fedora) this past weekend; I had fewer issues installing and using it as a day to day computer, than I did with Windows. Tried out Gnome and KDE both, preferred gnome but UI scaling (for my shit vision) was simpler out-of-the-box on KDE (about 125-150% was comfortable for me.) I found KDE a bit overwhelmingly customizable to start out with, and maybe a bit bloated.

The caveat to this was Gaming, in my case I did not have a good time with gaming (probably because I am trying to run at 4k and play a game dependant on Ubisoft DRM, as well as an older MMO that doesnt handle high DPI screens and ui scaling). Very frame-y at 4K, a decent amount of tinkering is/was required. YMMV, check ProtonDB as it is heavily dependent on what games you play, and heavily dependent on Steam. If you want to multi-box (without software, just alt-tab through windows) an MMO, I found functionally no information on how to open multiple instances of the same game to do so (which is why I mentioned the dependency on steam, which only seems to let you have one game launched at any given time)

Moving back to windows for gaming felt like a major downgrade as far as general computer work goes. Inside of an hour I had a fully functional, up to date, linux machine. Windows 11 took 1-2 hours to install and update itself, then another hour to install drivers, then longer to de-bloat and start disabling all the stupid shit from Microsoft. I'm sure I'll be doing that continuously for the next few weeks.

You can absolutely get by by, and have a great experience with GNOME + the app store.

Its a reason its default on so many distros.

If you decide yes, I highly recommend Fedora Silverblue, or any of the distros based on silverblue/ublue. I myself love Bazzite for gaming.

Those are atomic and immutable, meaning you cannot easily break core files, and every single thing can be updated in the app store. It's the windows equivalent of not being able to modify/delete C:\Windows; and getting firmware, drivers, applications, and Windows updates all in one click using the Microsoft Store.

Simple Answer: No

The moment you need to think about what distribution you need to choose from is where it'll stop any (dumb)user. Most people want a simple process with very little thinking.

If you are interested in learning linux and willing to take the time to understand the entire process that comes with it then yes.

If you pick a new user-friendly distro, nine times out of ten it'll run like a dream out of the box.

If you want to change something minor like a desktop background, you might need to search through menus for the settings or ask for advice.

If you want to install new hardware, like swapping in a new video card, you'll definitely need some assistance.