Every time this comes up, people forget that:
1) Flagship cards like the 3090 Ti and 4090 consume significantly more power than typical cards. You should not buy a flagship card if power is a concern.
2) You don't have to buy the flagship card. Product lineups extend all the way down to tiny single-fan cards that fit inside of small cases and silent HTPCs. It's a range of products and they all have different power consumption.
3) You don't have to run any card at full power. It's trivial to turn the power limit down to a much lower number if you want. You can drop 1/3 of the power and lose only ~10-15% of the performance in many cases due to non-linear scaling.
4) The industry has already been shipping 450W TDP cards and it's fine.
If power is an issue, buy a lower power card. The high TDP cards are an option but that doesn't mean that every card consumes 450W
This isn't necessarily a bad or losing strategy, BTW, it just is what it is. Data paths are often very hot and don't scale linearly in many dimensions, just like power usage doesn't. Using smaller bus widths and improving bus clock in return is a very legitimate strategy to improve overall performance, it's just one of those tough tradeoffs.
Rule of thumb: take any flagship GPU and undervolt it by 30%, saving 30% power/heat dissipation, and you'll retain +90% of the performance in practice. My 3080 is nominally 320/350W but in practice I just cliff it to about 280W and it's perfectly OK in everything.
[1] Some people might even be positively surprised, since a lot of the "leaks" (bullshit rumors) were posting astronomically ridiculous numbers like 800W+ for the 4090 Ti, etc.