I had no regrets spending £1749 on a 3090 Strix OC back when ampere launched at MSRP which by today's prices is a bloody steal, I certainly ain't spending between 2k and 3k on a single GPU as even I have my limits. I had 2x 2080 Ti FE cards at the time and with more games coming out with no SLI support and then nvidia announced they were pretty much killing it, it was a good time to drop both cards and move to the fastest single card out there.
By the time I sold both 2080 Ti's the 3090 Strix OC was about a £700 to £800 upgrade so it wasn't too bad though if I kept the cards a tiny bit longer I could have had a really good price for them now.
I need to drive a 4K 144hz screen and in even a 3090 in a lot of AAA titles its still not fast enough if I want to max every setting, especially with RT on.
I also ran 2x 1080 Tis when they launched so I've had 11GB VRAM cards for about 4yrs and there was no way I was downgrading my VRAM with a 3080 when games are only going to get more demanding overtime.
I don't drink or smoke, don't do much photography these days so PC gaming is my main hobby, so for the many thousands of hours I will be gaming for the 3090 is worth every penny to me.