The repositories for the big distros are so full that you rarely need to ever install anything that isn't already there for you. I use a crapload of software, and I have literally one thing that I've installed that I downloaded from the internet. All updates are handled by the package manager, so there aren't dozens of services running to check for updates. Installing software on linux was already so much easier, byt Flatpak and SNAP have made it absurdity simple.

On windows, you literally go to some website download an executable, and run it. Every time I need to do it for work, I'm shocked that it's such a messy and insecure setup.