Nvidia's not going to throw away $8 billion a year from the geforce lineup into the furnace. That would be A) incredibly stupid and B) geforce is their lifeline if AI goes belly up, and they know it. The reason people do not doubt nvidia is because they have consistently put out full generations of hardware with improvements every generation, even if those improvements are small, they are there.
Compare this with AMD, who sometimes cannot move the needle forward at all, other times it just doesnt release anything on the high end, or lets the mid range lag for 6 months after launch before releasing a product. (december 2022 for 7900xtx, september 2023 for 7800xt anyone?) Other times you get a Vega, where the lineup is a straight stinker. Then, once in a while, you get a semi competent lineup like the RX 6000s and get reminded what actual competition looks like.
consumers like consistency, somehow this continues to elude AMD and their fans who blame everything on "mindshare", because blaming nebulous evil things is easier than admitting your company has been screwing up for years and has totally destroyed consumer trust in the brand. AMD figured this out with their CPUs, but their GPUs continue to elude them. It's like AMD shoved all their old management under the GPU branch.