Every meaningful ARM CPU outside of smartphones is either attached to a hyperscaler, is a surrogate to a GPU that people actually want, or Apple who are not a merchant supplier and will never replace the bulk volume of Windows PCs.
Once Intel has their NVL-C2C CPUs, both DC and client, you can say goodbye to yet another failed Tegra experiment.
Merchant ARM in DC is super dead, nothing is in the same league as Turin let alone Venice.
Windows, well Qualcomm are going through it now and the majestic NV display core has doomed N1X to being too little, too late.
Nah, Nvidia has ways to push their stuff into the market. So their Grace/etc processors probably manage to sell even if they aren't that good, iirc.
Back when gaming GPUs were they main driver, I think they had a scheme where they basically extorted the card vendors and OEMs like this: if you wanted their highest performance GPUs (during the periods of high demand), you had to order bundles of relatively trash products (that wouldn't sell so well otherwise) together with them, like the MX chips, or old obsolete lowend chips that kept shipping for years and years.
When that worked, it killed two birds with one stone, earning extra revenue but also marketshare - since the Nvidia clients now held bags of those trash chips, it was now their task to sell them, so they might have cut orders of competing GPUs and go out of their way to put trash lowend dedicated Nvidia GPUs into laptops. It might have helped Nvidia get the nigh monopoly marketshare they have.
Now they can use similar tactics in servers, since the big corps have high demand for the datacenter GPUs so they may be similarly open to extortion.