Experience: I have a bit of experience with Linux. I started around 2008, distro-hopped weekly, decided on Debian until around 2011, when I switched to Windows as I started getting interested in gaming. Tried switching back around 2015, this time using Arch Linux for about a month, but had some bad experiences with gaming and switched back to Windows. I have had a Debian and Arch VM in Virtual Box since then for testing different applications and a more coherent environment to work with servers.
Understanding: Which brings me to now, I am really interested in using Linux for gaming, I know there is Proton from Valve and that they have been really pushing Linux gaming forward with it.
Thoughts: I have been contemplating dual booting by installing Debian to an SSD and simply using the UEFI boot menu to choose instead of having to install to the EFI of Windows.
I guess, I should just do it, as it won't affect my Windows installation, and I could test different games and if all works well, move over. This would also allow me to try different distributions, though my heart is for Debian, I even like Debian Unstable.
Note: I am sorry for the wall of text, I am just kind of anxious I guess.
I believe your last Linux experience in 2015 predates DXVK which has been transformative for Linux gaming. Wine used to have to implement its own DirectX replacement which necessarily lagged behind Microsoft's implementation, and IIUC didn't get the same level of hardware acceleration due to missing out on DirectX acceleration built into graphics cards.
Now DXVK acts as a compatibility bridge between DirectX and Vulkan. Vulkan is cross-platform, does generally the same stuff that DirectX does, and graphics cards have hardware acceleration for Vulkan calls the same way they do for DirectX calls. So game performance on Linux typically meets or exceeds performance on Windows, and you can play games using the latest DirectX version without waiting for some poor dev to reimplement it.
If you are using Steam with Proton, Lutris, or really any Wine gaming these days you are using DXVK. It's easy to take for granted. But I remember the night-and-day difference it made.