I spent ~2 years at Intel 20 years ago. My experience was kind of similar, although I didn't see the "People would spend their whole day just having coffee with random colleagues" aspect.
I left because I was working on a machine learning project that was a "solution in search of a problem;" and I spent too much time working alone. I was very early in my career and felt like I just wasn't learning enough from my peers.
Overall, I felt like Intel was a positive experience. I do think their biggest problem was that they had to many lifers and didn't have enough "healthy turnover." Almost everyone there started at the beginning of their career, and thus everyone who was mid-late career didn't understand what the rest of the industry was doing.
I left because I was working on a machine learning project that was a "solution in search of a problem;" and I spent too much time working alone. I was very early in my career and felt like I just wasn't learning enough from my peers.
Overall, I felt like Intel was a positive experience. I do think their biggest problem was that they had to many lifers and didn't have enough "healthy turnover." Almost everyone there started at the beginning of their career, and thus everyone who was mid-late career didn't understand what the rest of the industry was doing.