If you are into buying cards every gen? then yeah I can see why you would be a bit disappointed. However, you also need to realise that the landscape has changed. For many years a generation would last you about a year at the top end, maybe two, and then the games would improve and you would need a new GPU. The very fact I had my Titan XP for over three and a half years and it was still smashing out over 100 FPS at 1440p ultra says a lot to me. Even in the newest titles like COD MW and so on. It never seemed aged, and it never ran out of VRAM and so on.
Nvidia know all of this. Every single last bit of it. So what you are paying £1400 for a GPU now? well guess what, it lasts twice as long as the £700 one. And that lasts twice as long as the £350 one, and so on. In fact, the most disappointing part of the GPU race is how badly the entry level and mid range has sat totally stagnant. The RX 480 launched bloody ages ago, yet the 580 is still the budget choice all these years later. And it is only 10% faster than the 480 was.
That, IMO, is why the 3080 will "only" ship with 10gb VRAM. Because Nvidia know that when that runs out you will be back. I have seen games we have already hitting 9.5gb VRAM in games at 4k. So it came as no surprise that this 2080Ti equivalent for £600 less is going to come with a caveat or two. You want safety? you are being led back to the £1400 card. However, like I also said, if you are not chasing RT and you are being sensible that card will last you for years. Just like my Titan XP did. In fact, I should still have that now. And I could have held onto it for another two years at least. I just got really, really bored with it.