An RTX 3090 24GB is about $2150 new.
I've spent more on gaming rigs a couple times: it's not some unfathomable amount of money.
For a whole gaming rig? That's pretty typical. If you're spending that much for the video card alone? That's extreme. Yeah, I know many hobbies are expensive. But every expensive hobby I can think of (photography, cooking, arts/crafts, fashion)...if something costs $2000 more than an entry-level alternative, it lasts a lot longer than a video card. TBH, I was racking my brain thinking of worse uses of money. All I could come up with is auto racing.
Can I afford it? Absolutely, I make good money, but because I have a family and demanding job, I have many things competing for my time. I can't justify spending that much money for something that I won't get much use out of and is marginally better than a $500 investment. I know many gaming enthusiasts and none have bragged about spending that sort of money on video card...presumably because either they think that's a bad investment or NO ONE will understand why they did it.
I honestly feel sorry for people who do spend that type of money to play the same games at a higher frame rate and resolution. It's a lonely and solitary hobby. If you're overpaying for a car, at least you can give your friends a ride. If you overpay for camera gear (which I did when my kids were first born), you get amazing photos of friends and family to share and lenses last forever. If you buy expensive TVs, you can invite your friends for movie night. If you buy luxury cookware, you can entertain and it lasts forever. When you pay for insane hardware, you're playing multi-player games with people who spent literally $3000 less than you to get resolutions am skeptical you'll notice.
So yeah...I don't think a lot of people have these lying around. Overall, it's interesting and I'm glad it's available, but I know many AI evangelists and enthusiasts and I can't see this changing their short-term behavior if it requires spending $2200 and setting up a dedicated Linux machine.