Intel is a Dino company, with a terrible leadership. It also competes on different products (CPUs) compared to Nvidia (GPUs and AI chips). There is no reason why Nvidia would spend 100B in Intel.
Also, every good software engineer / chip designer who worked for Intel works now for Nvidia. Being just 3km away from each other, but paying less than half (when you count stock appreciation for Nvidia), maybe less than 1/5th is a very fast way of finding your best engineers leaving.
And then, even if Jensen Huang somehow goes stupid and decides to buy Intel (fun fact, his personal net worth is now higher than Intel’s market cap), probably it will get blocked by regulators (Arm dale to Nvidia was blocked in 2020-2021).