If your new product is that much better, you replace the demand for your old product with the demand for your new one. You even get to sell a new product to all the people who just bought your last product, and ideally continue to dominate the market and your competitors while they are struggling to catch up.
I suspect it's better to not be able to supply all the people who want your product, versus supplying lots of product that no one wants.
Yes, but you will end up losing money if...
1. Demand of the prior product means you'd sell out anyway because you cannot supply enough chips/cards
And
2. The chips are bigger thus you get even fewer chips from each wafer.
So you'd end up with a situation where you've not only raised demand but you're also lowered your supply of chips.
You'll end up selling less cards/chips. In both cases old card versus new card demand was high enough for you to sell every single chip you made because you could never get enough supply to meet demand.
As someone said, you "could" just raise the price in order to lower demand. And might end up making the same or close to the same as if you never introduced another product, but that's also a risky proposition. Raise the price too much and demand might drop far more sharply than expected and you end up losing more money than if you had just kept the price the same.
I have to say, if the rumors are true that Nvidia snatched up more 40 nm allocation than they needed due to AMD being overly cautious and not securing enough, then Nvidia were devilishly clever in limiting AMD's potential impact on overall marketshare. TSMC's continued problems producing 40 nm wafers obviously contributing to the situation.
It's similar to the situation Intel were in back in the old days where they might have a new architechture ready, but they would wait until demand started dying down before launching it. Worked great, until AMD snuck up and turned their world upside down with the Athlon 64. Now to limit the chances of that happening again, they generally release new architechtures as soon as they are done designing and testing them.
Regards,
SB