Memory pressure? You mean niceness?

Niceness just gives a program a higher CPU (and thus, RAM) priority.

Your system is still going to swap. The idling ram doesn't magically go away. That's how it works. If it didn't, you start experiencing bugs, crashes, and data loss, because there is no more room in the pool.

Just because a computer is "idle" doesn't mean it isn't doing anything, it is still performing work to stay on, composite your window manager, display it, run services in the background. Those services are still programs that are often vital to the operating system actually functioning, you can't just make that utilization magically disappear because you need more RAM because they tend to have lower niceness values than programs in userspace, even Windows understands that.

Yes, if you are swapping at idle then you indeed did do something horribly wrong, it is a bit comical that you don't realize that proves my point. The explorer.exe devs indeed did something horribly wrong, they released shitty half baked code because managers think more code = harder/better work when it is actually the reverse.

Sure, games.

That's not something Windows can do better. That's developers targeting a release only for Windows. Which is exactly the point I made in my original comment that you responded to. Games that have a native release (and even wine, sometimes) typically run faster on a Linux machine than on Windows, because there's less OS garbage overhead.

Graphics drivers are also better on windows too.

The only graphics drivers that are "better" are those for new cards when the manufacturer - again - targeted the windows platform.

The whole philosophy of device drivers is unfathomably better on Linux, because it works with chipset drivers and doesn't give a shit about which vendor a specific chipset came from, as long as the API is compatible. Also, almost everything that's not brand new hardware works out of the box on a vanilla install of e.g. debian (and definitely Linux Mint) whereas on Windows have fun installing drivers that come with tons of crapware.

As you said yourself: it's silly to make false claims. Just because some hardware vendors choose to build hardware for which they tailor drivers to windows, that's not a virtue or merit of windows, that's an abuse of monopoly if anything.

A vendor could also release a new graphics card with an internal electronic black box, release a linux driver and then say "haha, look, Windows can't support that". Except that with Linux, at some point, someone will decode the interface and get a working driver in a release somewhere.