

so what does Linux have that I need?
That should be the other way around, no? What do you need that Linux has (and Windows doesn’t). Otherwise it’s a case of “solution in search of a problem”. You presently do not seem to have a need as you have mentioned, so ideally you should leave it at that and continue using Windows.
What can motivate me to migrate?
While as I implied above only you can answer that authoritatively for yourself, a few examples of what other people seem to like about Linux might help perhaps -
- “Free as in beer”, so not having to spring for another license if you build another rig
- “Free as in Freedom”, which matters to many but not necessarily everyone
- Better environment for development
- Less susceptibility to malware (not necessarily because of inherent security, but also because Linux is not targeted as much)
- Heavily customizable, at the kernel, desktop environment, other software-level
- Choice of software update mechanisms as well frequency of updates depending on use-case
- Reviving of old computers where Windows would typically struggle to run
- Community participation, though this can be a hit or a miss depending on where you hang out and who you interact with
… and so on.
What is a good Linux to have for a desktop + steam?
There are many, but I generally recommend Linux Mint or Pop! OS for this use-case.
I have two laptops of this sort in use currently: One is a more recent AMD (5600H) + Nvidia (3080) and the other is an older Intel (some 10th-gen mobile) + Nvidia (2070). Both combinations work fine without any particular fiddling, apart from installing Nvidia proprietary drivers, on mostly any recent distro.
My use case is general desktop usage, Rust / C development, and occasional Steam-based gaming on these machines. Both laptops run pretty much the same as they did on Windows (GPU-wise). Fedora seems to work the best for me with everything setup nicely out of the box barring non-free stuff required from RPMFusion. On the Intel + Nvidia one, which is my distro-hopping laptop, I have used pretty much all distros without issue as well. Nix is however not included in the list of distros I have tried, but Arch is.