It’s so good that it counts as an upgrade.
I just installed WSL so I can learn Linux before I totally get rid of windows. If anyone has any suggestions for windows users learning Linux I will read them!
I would recommend you to try out Linux in a virtual machine and play around with it. You can watch this video if you don’t know how to set this up. You can do much more with a VM than with WSL. It allows you to basically try any Linux Distribution, whereas WSL only supports a few distros. In a VM you also get a desktop environment by default, whereas WSL mostly restricts you to the terminal. Sure, you can run graphical apps in WSLg, but you still don’t have a Linux desktop. Lastly, it’s much easier to take a snapshot of a VM, and roll back in case you break something.
After you get comfortable in a VM, maybe try booting a Live USB of some Linux distribution. That way you will be able to try it out on your actual hardware.
After that, you can set up dual boot. That way, you can still keep your Windows installation, but also use Linux without any restrictions or limitations.
Replacing Windows is always an upgrade
Can’t disagree with that
