Be aware that if you run a Windows 7 PC on your LAN, and it has access to the Internet, with no security updates, and it gets compromised, it has privileged access to your Windows 10 PC over the LAN, unless you make very special effort to configure it so that it does not. So your Windows 7 PC could be an easy path to compromise your Windows 10 PC, and that is what hackers look for.
Remember, MC needs access to the Internet to use the JRiver Access Key if Media Network is turned on, and for any updates to components not included in the installation file, which includes several components.
I have already converted over to the Linux OS on my regular PC and I would jump to the Linux side in a heartbeat for MC if the libraries and playlists were compatible.
They are, using either the
Portable Library functionality, or by making permanent changes to where the MC Library looks to find media files. If you do either, you can use a Windows Library on Linux, and not lose any tags or Playlists.
I haven't tested though, or have a Linux system to test against. But you can download a trial version of MC for Linux and spend a month testing it to confirm everything works as you wish. Of course, some features aren't available on Linux, such as TV, but if you are only using MC for audio, and don't use VSTs that are Windows only, you should try it.