Linux

Will my ability to play games be significantly affected compared to Windows?

Really depends on the games. For the vast majority, probably not. If you play competitive multiplayer games, then it's 50/50.

Check out protondb to see if the games you play the most work well.

Also semi-depends on hardware. Old Nvidia cards may struggle. AMD is def king in the Linux world, but it's getting better for Nvidia

But as you are probably aware, the steam deck has been pretty successful. That wouldn't happen if Linux gaming was all bad.

Can I mod games as freely and as easily as I do on Windows?

Hit or miss. Sometimes the mod tools have to use wine and don't work. Sometimes they use wine and work. Sometimes they don't use wine and work.

I have just done some modding of Monster Hunter Wilds, and it was about 50/50

When it works, it's just as easy as Windows.

If a program has no Linux version, is it unusable, or are there workarounds?

WINE or a Virtual Machine

Can Linux run programs that rely on frameworks like .NET or other Windows-specific libraries?

.NET is cross platform as of several years ago.

How do OS updates work in Linux? Is there a “Linux Update” program like what Windows has?

It depends on the distro. Typically you just run a command in the terminal to "update all packages" or click a button in a store front.

It's way easier than on Windows and is never forced.

Genuinely one of if not the best thing about Linux is how software management works.

How does digital security work on Linux? Is it more vulnerable due to being open source? Is there integrated antivirus software, or will I have to source that myself?

Less vulnerable due to being open source. You have all the security experts in the world, including Microsoft's, able to view and fix any vulnerabilities as soon as they appear. Thousands of people getting their eyes on it.

There's a reason that Linux is the back bone of the internet and nearly every server runs it.

And FYI, you don't use antivirus on Linux.

Are GPU drivers reliable on Linux?

If it works, it will always work.

Whether it works is dependent on your GPU.

Like I said, AMD is basically perfect, Nvidia can have problems, but these days that's less and less true (I use a GTX 3080 w/ out issue).

Mostly if you have an old, less-supported nvidia card (like pre-GTX) you may have issues.

Can Linux (in the case of a misconfiguration or serious failure) potentially damage hardware?

I've never heard of something like that happening.

And also, what distro might be best for me?

For beginners the correct option is almost always Linux Mint