Debian, but with latest kernels to improve gaming experience.
Genuine question as I'm a basic gamer but not a super performance oriented one (namely, I click "Play" and I enjoy with basically default settings) what PikaOS kernel version is available now (6.15.0 AFAICT from their wiki) versus current Debian stable (6.1.140-1 (2025-05-22) AFAICT from uname) feature is differentiating for gaming?
I understand, beyond security implication, that having a newer kernel should be "better" in general terms but if I take e.g 6.15 vs 6.1 what actual difference does it makes? Is it like a 1% FPS increase? It is a feature e.g. FreeSync/FSAA/etc that the driver itself require?
PS: I admit it's an in depth question because I have frequent "arguments" about people criticizing the "slow" Debian stable so this is kind of an excuse to understand what I am actually missing.

So... this is a long shot but I'd recommend to reconsider how you work. Switching to Linux is already amazing while also being demanding. Still, there are genuine alternatives to pretty everything on any OS, not just Windows.
What is more challenging IMHO but also more interesting... is reconsidering how you work, not just the tools you enjoyed so far. So yes, as others pointed in the thread there are custom file managers (beyond the default or popular ones) but, and please hear me out, there is also the command line. I know... I know it is VERY different but that's a good thing! If you already looked and used an alternative file manager it means you are a power user. The command line (or CLI for short) is precisely a way to have MORE freedom to manager files. There are countless tools that one can combine to modify files. It will take a while to learn but it's definitely worth it. A good starting point could be https://wizardzines.com/zines/bite-size-bash/
For the other software... well if it's from work, even though I'd also suggest to look at alternatives, e.g. learning Python/Tkinter or even low code FLOSS alternatives or Web based one... you might not have that freedom. Consequently I'm going to make an even more outlandish suggestion : if your work does not trust you to pick your own tool... maybe reconsider your workplace? I know, bit crazy but long term, might still be worth it.
Apologies for the life changing suggestions!