Between the discord devs outright refusing to do any kind of sound capture for linux screen sharing for several years, many updates requiring you to manually download and install a fresh tarball instead of being automatically applied like on windows, and refusal to maintain any kind of package on most repositories, I'd say it doesn't properly support linux. I do like Nobara's version of it, whatever they've done (I haven't looked much into it but it definitely seems custom to Nobara, or at least Red hat) though.

And speaking purely from personal experience with no real way to verify statistically (so take this with a rather large grain of salt), there are a LOT of CS or CE major types that would love to switch to it, but will be faced with random tools that they need like microchip studio, or some particular CAD software, just not working at all. For those that I've talked with at any length, if they could spin up a VM that effectively fully works as if it's bare metal, including proper display out that matches the monitor, whenever they need those few specific things, they would switch. They may not be many compared to 100% of global internet users, but they could certainly make up for 2%.

That said I mostly agree that devices like the steam deck are where linux is gonna grow, I just think that it would be going faster if more devs were able to daily drive it and care more about it, instead of having to be stuck reliant on Windows