Re: Wunnerful was never the point
Just on the gaming side, and granted this is a sample size of one, i.e. me.
But I recently decided to give Linux a go as a gaming system (around January), but wanted to be able to fall back to Windows if needed, so I went dual boot. So an existing Win 10 install (aka my main Gaming Rig OS), I then added Linux Mint, installed to a separate SSD (no real reason for Mint other than I was already familiar with it in various VMs).
The install went well, Mint recognised all hardware out of the box (Ryzen 5800X3D + AMD 6900XT). Including gaming specific keyboard and mouse. The only extra bit of software I needed to install was 'ckb-next', to get the back-light of my Corsair keyboard to come on (aka RGB).
Steam (which is where the majority of my games library is) has had a Linux native client for many years, and with the advent of the Steam Deck and Proton  (which is what prompted me to give this a go), this now makes installing Windows only titles a breeze on Linux.
A few games still work better under Windows, (MS Flight Sim for one, some of the Total war games), but most other games work just as well on Linux as they do under Windows, some actually performing better on Linux! For example some legacy games I've tried, that were written for Windows 7 or earlier, can be difficult to get running on Windows 10 (crashing etc), but work fine on Linux via Proton. Others that I had issues running under Windows 10, such as Knights of the Old Republic II (crashes regularly for me, tried all sorts), turned out to have a native Linux version, which works better (for me anyway) than the Windows version did!
Overall, I now spend probably 95%+ gaming on Linux, and if any new purchased don't work under Linux, they get refunded, or at least that's the plan, I haven't actually had one yet that failed to work! Can't see me ever going back to Windows now for gaming, at least not on any sort of regular basis.
If you want to see the state of Linux gaming, for Steam anyway, check out https://www.protondb.com/ as they list all the games in Steam and how well they work in both the Steam Deck, and in standard Linux.
Plus it's worth noting, often Steam Deck compatibility is rated poor for some games due to the controls, as the Steam Deck uses console like controls and a touch pad, rather than it being performance issues, this is a non issue for regular Linux, as you'll almost certainly have a keyboard and mouse, which is what most PC games expect to see of course.
1: For background, Gabe Newell (aka Mr Valve/Steam) is well known to really hate MS and Windows in general, and apparently really dislikes the direction MS is taking Windows in, and Steams currently reliance on that platform. As such Valve have been trying to move away from Windows for years. They released a Linux native Steam client many years ago now, and also worked on Steam OS based on Arch Linux (they were aiming at basically building a Steam based console, produced by other companies, but it didn't really pan out).
Work continued on Steam OS anyway, with Steam OS 3.0 being released last year to run on the then new Steam Deck, this is basically a portable PC running a tweaked Arch Linux, and includes Proton, a customised version of Wine, the Windows compatibility layer, but focusing on gaming. (There are also people working on a non Steam Deck version of Steam OS 3.0, for regular hardware).
The Steam Deck has been quite popular, and has pushed many developers and publishers in the last 18 months or so, to get their games Steam Deck compatible verified. This compatibility is shown on the games store page in Steam, so lots of effort gong on to get their games listed as Verified and with a big green tick. If the game works on the Steam Deck, then it's almost certainly going to run on a regular Linux install, as long as the hardware is up to the job of course.